BEGIN:VCALENDAR VERSION:2.0 PRODID:-//pretalx//2024.stateofthemap.org// BEGIN:VTIMEZONE TZID:+02:00 BEGIN:STANDARD DTSTART:20000101T000000 RRULE:FREQ=YEARLY;BYMONTH=1 TZNAME:+02:00 TZOFFSETFROM:+0200 TZOFFSETTO:+0200 END:STANDARD END:VTIMEZONE BEGIN:VEVENT UID:pretalx-sotm2024-bae2fa8b-dd6e-52b2-90c3-c401f340d50f@2024.stateofthema p.org DTSTART;TZID="+02:00":20260828T093000 DTEND;TZID="+02:00":20260828T095000 DESCRIPTION:We welcome the OpenStreetMap community in Paris and online to c elebrate the international State of the Map conference. This session will also provide some formal instructions and helpful information. You will fo r example learn how the Q&A (question and answer) sessions are run and wha t we will do at the social event. DTSTAMP:20260817T030503Z LOCATION:Guadeloupe SUMMARY:Opening — SotM Working Group URL:https://pretalx.com/sotm2026/talk/SEDEA8/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-4e6d6b4d-f90c-569e-93c6-0234cd20defa@2024.stateofthema p.org DTSTART;TZID="+02:00":20260828T095000 DTEND;TZID="+02:00":20260828T102000 DESCRIPTION:Panoramax started a few years ago in France\, initiated by Open StreetMap France and IGN.\nThis project is part of the OSM family\, becaus e ground level pictures are so useful for OSM mappers.\nThis talk will pro vide an overview of the project\, how it works\, the full open-source appr oach\, the decentralization and federation\, and will describe the next st eps\, including the launch of the Panoramax Foundation. DTSTAMP:20260817T030503Z LOCATION:Guadeloupe SUMMARY:State of Panoramax — Christian Quest\, Adrien Pavie URL:https://pretalx.com/sotm2026/talk/PCMPNK/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-5fd42080-5920-506a-a61b-a78ff803cece@2024.stateofthema p.org DTSTART;TZID="+02:00":20260828T111500 DTEND;TZID="+02:00":20260828T113500 DESCRIPTION:The world is big. So is the global OpenStreetMap dataset -- and it's growing bigger each day. This is great\, of course\, since OSM is be coming ever more complete and detailed. But working with this data volume requires high-end hardware\, SQL skills\, and ample patience.\n\nGeoDesk t akes a novel approach\, with a database engine designed specifically for O SM data\, with orders-of-magnitude improvements in import times\, storage requirements and query speed. The software is 100% free and open-source an d runs on Windows\, Linux and macOS\, with modest hardware requirements.\n \nIn this talk\, I'll cover the basics of the GeoDesk workflows: how to im port OSM data and perform basic queries using the command line\, and expor t results in various formats. I will also give an introduction to the thre e GeoDesk SDKs for Python\, Java\, and C++. These toolkits allow more soph isticated spatial queries and can be integrated with other popular librari es (e.g. JTS\, Shapely\, and GEOS) to build full-fledged geospatial applic ations.\n\nFinally\, I will briefly outline the project roadmap for the 3. 0 release coming this fall. DTSTAMP:20260817T030503Z LOCATION:Guadeloupe SUMMARY:GeoDesk: The OpenStreetMap toolkit that's fast\, easy and fun — M artin URL:https://pretalx.com/sotm2026/talk/EGFGRJ/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-eb275f20-abe6-5a88-857f-0ce11d5b0759@2024.stateofthema p.org DTSTART;TZID="+02:00":20260828T111500 DTEND;TZID="+02:00":20260828T113500 DESCRIPTION:Road infrastructure data held by French territorial authorities is rich\, authoritative and largely invisible to the open data ecosystem. This talk presents the journey of an active OSM and Wikidata contributor who also works in road information management at municipal\, intermunicipa l and departmental levels in Southern France. This dual role has led to th e design of a coherent\, nested open data architecture for road intelligen ce.\nAt the core lies a data model in which Wikidata acts as the geometric abstraction layer enabling convergence of non-official data sources and m ulti-database identifiers — its design encouraging exhaustiveness throug h sourced statements and a completeness gauge that makes quality progress both visible and rewarding. OpenStreetMap holds the geometric and operatio nal details\, while BD TOPO (IGN) serves as the authoritative reference da taset to which both OSM geometries and Wikidata items are systematically c ross-referenced and linked. This nesting creates a powerful convergence: t he State's national reference\, locally produced data from territorial aut horities\, and their near real-time mirroring through OSM geometry and Wik idata semantics.\nPanoramax street-level imagery feeds both OSM mapping ta sks and change detection workflows — including early experiments with AI -assisted approaches applied to infrastructure monitoring. The presentatio n covers modelling choices at the Wikidata–OSM interface\, automation pi pelines that reduce friction between internal road management tools and op en data outputs\, and practical benefits for road users across GPS and nav igation applications.\nThis talk targets contributors interested in Wikida ta–OSM integration\, open government data processes\, and the practical use of street-level imagery for infrastructure maintenance. It will also o penly address methodological limits\, work organization practices\, and cu rrent gaps in tools within and around the OpenStreetMap ecosystem — incl uding possible ways forward\, and an honest look at tensions between the p ace of field experimentation and the deliberative nature of community cons ensus. DTSTAMP:20260817T030503Z LOCATION:La Réunion SUMMARY:Structuring Road Information in Open Data: A Nested Wikidata – OS M – BD TOPO (IGN) Architecture Co-produced by Territorial Authorities — Jean-Louis ZIMMERMANN URL:https://pretalx.com/sotm2026/talk/VS9YKN/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-d235ed7c-0958-5cbc-9e5a-6cfbad1b4a82@2024.stateofthema p.org DTSTART;TZID="+02:00":20260828T111500 DTEND;TZID="+02:00":20260828T113500 DESCRIPTION:SNCF Réseau is the railway infrastructure manager of France. C ulturally in this big (53 000 employees)\, old (founded in 1938 to nationa lize pre-existing railway companies) company\, geographic and open data is little well known nor used. \nWe replaced outdated internal data with Ope nStreetMap’s railway track data (and not only as a base layer!). In this talk\, we will tell you how we pulled this off. DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:Sneaking in OSM data into a big old company — Céline DURUPT\, Tr istram Gräbener URL:https://pretalx.com/sotm2026/talk/K8XYAN/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-92794335-a321-52ca-a6bc-d7c166ce1ab5@2024.stateofthema p.org DTSTART;TZID="+02:00":20260828T111500 DTEND;TZID="+02:00":20260828T121500 DESCRIPTION:Starting out mapping can feel scary\, especially if one has lit tle or no prior knowledge about the tools\, concepts and workflows of crea ting a map. OpenStreetMap\, as a collaborative project\, is welcoming ever y new mapper with open hands and tries to help and guide new contributors by offering mapping tools that are well suited also for beginners. This wo rkflow showcases some of these tools\, in particular the iD editor\, the d efault map editor on openstreetmap.org. The basics of mapping are shown in a few examples of common mapping situations. Also covered are the ins and outs of the OSM community\, resources where to find help\, as well as the most important concepts of OpenStreetMap's data and tagging model. DTSTAMP:20260817T030503Z LOCATION:Tahiti SUMMARY:OSM Mapping 101 — Martin Raifer URL:https://pretalx.com/sotm2026/talk/WHNUVN/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-b54acdad-c13d-56cb-9d7f-2e7b3aae31bb@2024.stateofthema p.org DTSTART;TZID="+02:00":20260828T115000 DTEND;TZID="+02:00":20260828T121000 DESCRIPTION:As main developer of MapComplete\, I do think a lot about how p eople edit OpenStreetMap and how those edits relate to the rest of the dat a and the rest of the ecosystem.\nAt the same time\, there are many OSM-ed itors out there. While this choice might be a bit confusing for new contri butors\, the OSM ecosystem thrives by having multiple editors.\n\nIn this talk\, I would like to zoom out and give different frameworks and perspect ives on how to think about editing software\; and how editors relate to ea ch other - they often complement each other.\n\nSome questions I'll answer are:\n\n- how can we compare editors?\n- What makes an editor a good edit or? What makes it a powerful editor?\n- How do editors relate to the data they edit?\n- What will the future bring? DTSTAMP:20260817T030503Z LOCATION:Guadeloupe SUMMARY:Perspectives on editors — Pieter Vander Vennet URL:https://pretalx.com/sotm2026/talk/UHXHDT/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-295e7204-ba9c-5821-b8e1-49cc1512e4ce@2024.stateofthema p.org DTSTART;TZID="+02:00":20260828T115000 DTEND;TZID="+02:00":20260828T125000 DESCRIPTION:Every map embeds choices: what to show\, what to omit\, what to centre\, who is included as a stakeholder\, who decides on the legend. Mo st of these choices are invisible to the people who use the resulting maps as inputs into their daily lives — and into democratic decisions\, from a local town-planning vote to a national policy debate.\n\nThis panel ask s who\, and through what processes\, should be in charge of those choices\ , and how communities like OpenStreetMap\, official mapping agencies and e merging civic-cartographic movements can collectively raise the democratic stakes of mapmaking. DTSTAMP:20260817T030503Z LOCATION:La Réunion SUMMARY:The democratic stakes of mapmaking: a cross-community panel — Mat thieu Chatry URL:https://pretalx.com/sotm2026/talk/SMGDU7/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-312b0781-b4ae-5d4e-9258-e2cad78bead3@2024.stateofthema p.org DTSTART;TZID="+02:00":20260828T115000 DTEND;TZID="+02:00":20260828T121000 DESCRIPTION:Producing a single map targeted at public transport users might be straightforward... but what if you had to produce a hundred? Or a thou sand? Or **35\,000**..? All of them adhering to high standards of quality and consistency\, while also ensuring they are up-to-date\, across Europe' s most extensive public transport network?\n\nAnd what if open data could play a vital role?\n\nDiscover how « **plans de proximité** » (location -specific area maps) are designed\, produced and maintained for bus and tr am stops across the entire Paris region. DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:One region. 40\,000 bus stops. An OSM map at every one. — Sergio Luke\, Florian Lainez URL:https://pretalx.com/sotm2026/talk/JDCVGM/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-7c822588-718e-5684-a0b6-e7f1d1ef0516@2024.stateofthema p.org DTSTART;TZID="+02:00":20260828T122500 DTEND;TZID="+02:00":20260828T124500 DESCRIPTION:Turns out that some people not only ignore OpenStreetMap licens e\, but use OpenStreetMap servers to power their license-violating project . At least in such cases license enforcement can become a bit easier: as n ow their server access can be switched of.\n\nDescription of https://githu b.com/openstreetmap/tile-attribution project\, how it works\, how you can help. And what was achieved so far. DTSTAMP:20260817T030503Z LOCATION:Guadeloupe SUMMARY:Update on attribution enforcement for users of OpenStreetMap server s — Mateusz Konieczny URL:https://pretalx.com/sotm2026/talk/8V7LYM/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-abef1c79-84f6-5a1d-be2f-6f0ef146da97@2024.stateofthema p.org DTSTART;TZID="+02:00":20260828T122500 DTEND;TZID="+02:00":20260828T124500 DESCRIPTION:How do you deliver smooth\, detailed mapping to millions of pas sengers aboard French TGV trains while working within tight storage and se rver resource constraints? This talk traces the journey of renewing the ma pping system for the WiFi portal on board the TGV fleet (300 train sets).\ n\nWe will explain our choice of PMTiles technology to move to vector tile s without relying on a heavy cartographic server. We will share our resear ch into data size optimization — from studying the impact of building fo otprints to managing zoom levels — and walk through the trade-offs requi red to ship a complete European base map on board. Finally\, we will cover the specific work done on railway data (routes\, diversion paths) and the custom design created to give passengers an immersive experience at 300 k m/h. DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:OpenStreetMap on Board: How We Fit Europe into 300 High-Speed Train s — Benjamin Demonet URL:https://pretalx.com/sotm2026/talk/TV9DUV/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-bfa603c3-8a6d-5736-ad7d-f04e603896f9@2024.stateofthema p.org DTSTART;TZID="+02:00":20260828T143000 DTEND;TZID="+02:00":20260828T151000 DESCRIPTION:OpenStreetMap is widely used throughout the emergeny services - but this is not well known in the broader OSM community. In this talk\, f irefighters and emergency service practicioners will give an overview of h ow they use and contribute to OSM. \n\nWe'll show all scales of OSM integr ation\, from grass roots activities like hydrant mapping to full scale ado ption by the entire department for planning\, dispatch and emergency vehic le routing. DTSTAMP:20260817T030503Z LOCATION:Guadeloupe SUMMARY:Emergency Services using OpenStreetMap in Germany — dadavid URL:https://pretalx.com/sotm2026/talk/3GRKKJ/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-6f3b6a97-66f4-5150-8dd8-9aadc4f2f925@2024.stateofthema p.org DTSTART;TZID="+02:00":20260828T143000 DTEND;TZID="+02:00":20260828T145000 DESCRIPTION:[MapRoulette](https://maproulette.org/) is a micro-task platfor m for OpenStreetMap. Thousands of mappers use MapRoulette every month to f ind small but meaningful fixes to the map: a building that crosses a road\ , a business with an invalid phone number\, a river that flows the wrong w ay. Each task is designed to be quick to fix and easy to understand. There are tasks for all mapper experience levels and for almost every country i n the world. MapRoulette is a community-driven platform: anyone can create tasks using an easy-to-use interface. In 2025 alone\, mappers made around 700'000 map improvements using MapRoulette!\n\nBehind the scenes\, we hav e been working on a completely new version of the MapRoulette website and the API. The new website is easier to navigate\, has a modern design\, and a much improved search function. The map views have been overhauled to sh ow a lot more relevant information. After a period of community feedback\, we released MapRoulette v4 earlier this year. In this presentation\, MapR oulette creator Martijn van Exel will show you around the new version\, ta lk about plans for the future\, and explain how to integrate your applicat ion with the MapRoulette API. DTSTAMP:20260817T030503Z LOCATION:La Réunion SUMMARY:Announcing MapRoulette 4! — Martijn van Exel URL:https://pretalx.com/sotm2026/talk/WJFRPV/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-46884566-a0b0-5b48-97c7-9a5a1ed832e5@2024.stateofthema p.org DTSTART;TZID="+02:00":20260828T143000 DTEND;TZID="+02:00":20260828T145000 DESCRIPTION:Hospital campuses can be overwhelming—especially in stressful situations where finding the right department quickly really matters. In collaboration with a major French hospital\, we built an application power ed by OpenStreetMap that brings together mapping\, medical directories\, a ccessibility data\, event management and multimodal routing to guide users seamlessly to their destination. In this talk\, we’ll share the functio nal\, technical\, and organizational challenges behind turning complex hos pital environments into clear and accessible navigation experiences. DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:Lost in hospital? OpenStreetMap to the rescue — Daphné Lercier\, Lonny Loquesol URL:https://pretalx.com/sotm2026/talk/93XYRL/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-1931267f-2060-5b59-b55d-9977c6f82b06@2024.stateofthema p.org DTSTART;TZID="+02:00":20260828T143000 DTEND;TZID="+02:00":20260828T153000 DESCRIPTION:After several years of virtual Local Chapters & Communities Con gresses\, the LCCWG is bringing the Congress back in person at State of th e Map. Whether you represent a formally affiliated Local Chapter\, lead a local user group\, or are just curious about how OSM communities around th e world organize themselves\, join us to swap stories\, share what's worki ng (and what isn't)\, and help shape what community support should look li ke. DTSTAMP:20260817T030503Z LOCATION:Tahiti SUMMARY:Local Chapters & Communities Congress — Laura Mugeha\, Michael Mo ntani\, Maggie Cawley\, Geoffrey Kateregga URL:https://pretalx.com/sotm2026/talk/E7G93L/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-0c17e1cc-0cd1-532a-af8a-667830d9d281@2024.stateofthema p.org DTSTART;TZID="+02:00":20260828T150500 DTEND;TZID="+02:00":20260828T152500 DESCRIPTION:Alongside the enrichment of the OpenStreetMap database over the years\, numerous tools have been developed to interact with or to create derivative products: editors\, data extraction tools\, geocoding services\ , slippy maps\, or routing engines. Most of these tools are accessible vi a scripting languages through APIs or dedicated libraries. Among these lan guages\, R stands out as a free and open source programming language and s oftware for statistical computing and data visualization. Complemented by more than 23\,500 user-contributed packages hosted on the Comprehensive R Archive Network in 2026\, the language’s versatility allows users to bui ld unified workflows within an environment conducive to reproducible resea rch. R is widely used for research purposes in many fields beyond statisti cs\, such as biology\, social sciences\, or geomatics. A subset of its pac kages forms a robust and mature spatial ecosystem that makes it easy to ha ndle and display spatial data. Consequently\, R provides seamless access t o various APIs and tools for downloading and filtering OpenStreetMap data\ , querying shortest routes and itineraries\, or generating both static and interactive maps. \n\nAs part of our research activities\, we have develo ped some of the key OpenStreetMap-related R packages. For example\, the _o srm_ package has enabled the integration of time-distance calculations in many academic studies by providing a straightforward access to the OSRM ro uting engine. The package has been widely used in numerous published paper s across various disciplines (health\, transport\, environmental science\, or education). Thus\, we argue that R enables researchers to efficiently use OpenStreetMap thanks to a unified and reproducible environment and spe cialized packages.\n\nIn this presentation\, we first explore a curated se lection of R packages designed to interact with the OpenStreetMap database . We begin with packages that download and extract data\, such as _osmextr act_ and _osmdata_. Then\, we explore solutions that interface third party softwares for geocoding (Nominatim with _tidygeocoder_) and routing (OSRM with _osrm_\, Valhalla with _valh_). Finally\, we address dynamic cartogr aphy (using _leaflet_) and creation of static maps from raster tiles (usin g _maptiles_) or from vector objects (using _maposm_). \n\nTo illustrate t he practical application of these tools\, we conclude with a short\, seaml ess and fully reproducible example. From the geocoding of an address\, to the extraction of amenities or the use of routing engines and till the cre ation of a publication-ready map\, we propose a complete workflow that har ness the power of R ecosystem to create insightful analysis from OpenStree tMap data. DTSTAMP:20260817T030503Z LOCATION:La Réunion SUMMARY:From OpenStreetMap APIs to Insightful Data Analysis: Extraction\, A nalysis\, and Mapping with R — Louis Laurian URL:https://pretalx.com/sotm2026/talk/83LBSJ/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-a06970e0-ad77-5a2b-947a-6772c5ce33d1@2024.stateofthema p.org DTSTART;TZID="+02:00":20260828T150500 DTEND;TZID="+02:00":20260828T152500 DESCRIPTION:Digitaleo publishes business information to OSM for ~14\,000 Fr ench points of sale\, on behalf of the owners themselves. We took the acti vity back in-house in early 2026 after issues with a previous provider. Th is talk is a REX on eight months of organised editing done in public: how a forum thread with the French OSM community reshaped our publisher addr:* vs contact:*\, SIRET adoption\, social media URL reclassification\, disus ed handling and why "fix the process\, not the POI" changed our engineerin g. DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:Publishing 14\,000 Businesses to OpenStreetMap: How Community Feedb ack Reshaped Our Publisher — Digitaleo URL:https://pretalx.com/sotm2026/talk/33VMB8/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-9b75fa47-fe1a-5b22-9c0c-8482740a1620@2024.stateofthema p.org DTSTART;TZID="+02:00":20260828T154000 DTEND;TZID="+02:00":20260828T160000 DESCRIPTION:Maps have been essential in the development and the success of OpenStreetMap. They were and still are the single most important medium o f communication across language and culture gaps between members of the OS M community.\n\nMaps in that role however - as a shared visualization of t he work of the mappers\, providing an identical picture to everyone viewin g them\, and this way facilitating communication - seem to be on the way o ut\, at least as far as OpenStreetMap is concerned. It is not unlikely th at in a few years\, for better or worse\, the only forms of visualization of OSM data most community members will know and use on a daily basis are individualized depictions in the user interfaces of digital tools.\n\nThis talk is going to discuss this development and the social role of maps in OpenStreetMap in its historical context and explain how the OSM community is essentially unprepared for this foreseeable loss of a central means of communication among its contributors. DTSTAMP:20260817T030503Z LOCATION:Guadeloupe SUMMARY:Do maps have a future in OpenStreetMap? — Christoph Hormann URL:https://pretalx.com/sotm2026/talk/TLGDFF/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-0bb87267-d319-5b72-9e30-2f0d7bb8ff6b@2024.stateofthema p.org DTSTART;TZID="+02:00":20260828T154000 DTEND;TZID="+02:00":20260828T160000 DESCRIPTION:As OpenStreetMap matures\, volatile IDs hinder data integration . We propose the OSM Persistent ID Specification (OSMPID) to provide stabl e references for developers\, the tourism sector\, Wikidata and others. Se rving as a community-driven alternative e.g. to the GERS-ID\, we introduce an HTTP-based Object Identity Service prototype. This talk outlines the t echnical roadmap to empower reliable\, long-term applications built on int egrated open OSM location data. DTSTAMP:20260817T030503Z LOCATION:La Réunion SUMMARY:OSMPID: A Persistent ID Specification and an Object Identity Servic e — Stefan Keller URL:https://pretalx.com/sotm2026/talk/CYVSG9/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-95d46528-69ae-5dad-8bc6-fe219d323112@2024.stateofthema p.org DTSTART;TZID="+02:00":20260828T154000 DTEND;TZID="+02:00":20260828T160000 DESCRIPTION:OpenStreetMap is one of the richest databases in the world. sta te of the map\n\nwhenever it comes to creating a vector base map\, we all run into the same wall: the daunting complexity of MapLibre/Mapbox GL styl e files. The result? We tend to fall back on "off-the-shelf" styles or min or variations\, smoothing over the semantic richness of the underlying dat a.\n\nAs a GIS engineer at Tesmo Maps / SNCF Connect\, I had to rethink my methods to stop being held back by my tools. In this talk\, I share my ha nds-on experience building an industrial-grade workflow to regain full con trol over map rendering:\n\n- **Style-as-Code:** Why and how I moved away from visual editors (such as Maputnik) to work directly with JSON in a tex t editor.\n- **The "Live Edit" workflow:** A walkthrough of my toolstack — simple\, reproducible\, and built entirely on open-source components.\ n- **The Design/OSM translator:** My method for collaborating with designe rs who have no background in geography or the OSM data model\, and turning their creative intentions into complex technical filters.\n\nThe goal is to show that anyone can build and maintain a large number of fully custom styles. DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:Style-as-Code: Moving Beyond "Off-the-Shelf" to Unlock the Full Ric hness of OSM Data — paul goullencourt URL:https://pretalx.com/sotm2026/talk/PKETRT/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-7abdd1d5-b7ed-52a9-b4c0-284dae247f72@2024.stateofthema p.org DTSTART;TZID="+02:00":20260828T164500 DTEND;TZID="+02:00":20260828T170500 DESCRIPTION:With the recent support on openstreetmap.org for Maplibre-based maps\, I thought it would be interesting to create a new version of our T ransport map styles\, to take full advantage of the client-side rendering. \n\nIt wasn't as straightforward as I had hoped! In this presentation I'll discuss what I learned along the way. I'll dig into some of the features and limitations of Maplibre when converting from existing Mapnik styles\, and suggest some changes to Maplibre to make future cartographic work easi er. I'll also go into the details of some features I added to Glug\, the c artographer-friendly stylesheet language that I used for this project. DTSTAMP:20260817T030503Z LOCATION:Guadeloupe SUMMARY:Client-Side Transport Maps on OpenStreetMap.org — Andy Allan URL:https://pretalx.com/sotm2026/talk/GCP9RW/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-84d4f3f6-45be-554e-8de3-5a32afd7b3fe@2024.stateofthema p.org DTSTART;TZID="+02:00":20260828T164500 DTEND;TZID="+02:00":20260828T170500 DESCRIPTION:Government agencies collect and share digital terrain models an d aerial imagery as open data. Terrain and aerial imagery are often used a s background below OpenStreetMap vector data on interactive web maps. But so far\, only commercial actors have aggregated open terrain and aerial im agery datasets at scale into a unified data product. The Mapterhorn projec t aims to bring together all available open terrain and aerial imagery dat a in one place and share it free of charge as PMTiles downloads. In this t alk\, we will first have a look at the terrain pipeline which was applied to more than 15 TiB of raster elevation data. We will then look into how t he aggregated terrain PMTiles can be used in applications. Finally\, we wi ll discuss the ongoing efforts to extend the existing terrain pipeline to aerial imagery. DTSTAMP:20260817T030503Z LOCATION:La Réunion SUMMARY:Mapterhorn Terrain and Imagery — Oliver Wipfli URL:https://pretalx.com/sotm2026/talk/UQF7NY/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-328554c3-3b2f-5c1c-ba57-b47bf5de8e2e@2024.stateofthema p.org DTSTART;TZID="+02:00":20260828T164500 DTEND;TZID="+02:00":20260828T170500 DESCRIPTION:SNCF Transilien has mapped with great details 436 train station s in the Greater Paris area. This work was conducted in several stages\, b etween 2018 and 2022. An application using this data helps travelers to fi nd their way inside and around railway stations. The app displays multi-le vel floor plans\, enables users to find equipments and services\, and prov ides indoor/outdoor routing with an option to use elevators rather than st airways.\n\nEnsuring these services function properly requires to **mainta in the data**. This means both updating it when a station or its neighbour hood has changed\, and preserving the high quality of the data. The latter is achieved by checking changes to the data inside and around railway sta tions. This **moderation work** is achieved through an innovative process that enables us to :\n- compare the data for each station between 2 dates freely defined\n- detect and classify changes that need to be checked \n- apply a whitelist to avoid checking one's own changes\n- review those chan ges and produce a report \n\nWe set up a project that is based on **PostGI S** and **QGIS**\, makes use of **osmium** and **osm2pgsql**\, and require s a small amount of SQL code to detect changes. This project enables us to efficiently moderate the data changes that can impact the SNCF app. \n\nT his talk will present our methodology\, which can be replicated and adapte d to all sorts of OSM data\, along with a few helpful tricks. DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:How Carto’Cité maintains OSM data for 436 train stations efficie ntly using PostGIS and QGIS — Antoine Riche URL:https://pretalx.com/sotm2026/talk/CXXRXD/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-f8c60032-4621-5cec-8291-801c21e3a9c1@2024.stateofthema p.org DTSTART;TZID="+02:00":20260828T164500 DTEND;TZID="+02:00":20260828T174500 DESCRIPTION:How do we turn a one-day contributor — someone introduced to OSM at a mapathon\, an outreach booth or an awareness event — into a map per who keeps contributing over time?\n\n**Carto'Mission** is a fully coop erative board game designed to address precisely this retention challenge. Around a printed board representing a small section of a city\, players t ake on the role of a team of mapping agents tasked with verifying\, correc ting and completing geographic data. But Carto'Mission is more than a game : it is a **non-digital mediation device** that simulates the peer-review process at the heart of OpenStreetMap\, and serves as a **pedagogical spri ngboard** toward real-world use of tools like StreetComplete and iD.\n\nTh is talk offers a hands-on report on the design\, facilitation and deployme nt of the game\, along with the lessons learned from our first field exper iences. DTSTAMP:20260817T030503Z LOCATION:Tahiti SUMMARY:Carto'Mission: Bringing Participatory Mapping Off-Screen Through Co operative Play — Coralie Le Bian URL:https://pretalx.com/sotm2026/talk/H8JKNT/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-26f567f2-612e-5836-8222-2aa7589b1604@2024.stateofthema p.org DTSTART;TZID="+02:00":20260828T172000 DTEND;TZID="+02:00":20260828T174000 DESCRIPTION:This talk presents two projects: Sourdough (a new vector tile s chema) and Layercake (thematic extracts of OSM data in cloud-native format s). These projects serve different audiences but have similar design goals : to make it easier for people to use OSM data\, reduce accidental complex ity in data consumers' workflows\, and strengthen feedback loops between O SM data users and the mapping community. I will discuss these design goals in depth\, along with the technical decisions each project makes in pursu it of them\, and conclude with announcements about new features and future roadmaps for both projects. DTSTAMP:20260817T030503Z LOCATION:Guadeloupe SUMMARY:Sourdough and Layercake: removing technical barriers to using OSM d ata for cartography and analysis — Jake Low URL:https://pretalx.com/sotm2026/talk/EMMH8Q/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-3c6fa4ab-59c1-5053-9c6b-23d3713959ee@2024.stateofthema p.org DTSTART;TZID="+02:00":20260828T172000 DTEND;TZID="+02:00":20260828T174000 DESCRIPTION:In Lyon's State of the Map France 2024\, cartes.app was pitched : a French libre Web alternative to Google Maps built on OSM (among lots of free sources). \n\nWe're now proud to show the internationalised versio n of cartes.app. The interface is translated\, the map place names too tha nks to an automated full planet tiles generation\, as well as the transpor t itineraries made available outside of France. \n\nLots of new features h ave landed apart from i18n\, we'll demo them and talk about the future of the initiative. DTSTAMP:20260817T030503Z LOCATION:La Réunion SUMMARY:Cartes.app is now international — Maël THOMAS-QUILLÉVÉRÉ URL:https://pretalx.com/sotm2026/talk/HVPZWK/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-666bb0d9-24ad-54c2-a10f-e546d66ab1b9@2024.stateofthema p.org DTSTART;TZID="+02:00":20260828T172000 DTEND;TZID="+02:00":20260828T174000 DESCRIPTION:Lightning talks are short presentations (maximum 5 minutes) abo ut a topic related to OpenStreetMap. DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:Lightning Talks I — SotM Working Group URL:https://pretalx.com/sotm2026/talk/8ZWXKA/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-5bb34735-ebbe-513e-aae8-05b2c66376a1@2024.stateofthema p.org DTSTART;TZID="+02:00":20260828T175500 DTEND;TZID="+02:00":20260828T181500 DESCRIPTION:MapLibre has became one of the critical pillars of open source mapping\, including map data transformations\, formats\, rendering\, and i nteraction on all platforms. You see MapLibre everywhere\, from small web sites to giants like Microsoft Bing Maps\, from hobby phone apps to the gi ants like Lyft. New MLT tile format allows smaller faster tiles with new f eatures in 2D and 3D space replacing legacy MVT format. Martin tile server has became the fastest tile server with numerous supported backends\, for mats\, and features. This status update will cover all this and more. DTSTAMP:20260817T030503Z LOCATION:Guadeloupe SUMMARY:MapLibre - from data to rendering\, in one status update — Yuri A strakhan\, Frank Elsinga URL:https://pretalx.com/sotm2026/talk/MKKGG9/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-3b78dcba-8941-5247-a786-2a0a294d0b6a@2024.stateofthema p.org DTSTART;TZID="+02:00":20260828T175500 DTEND;TZID="+02:00":20260828T181500 DESCRIPTION:It has been more than a decade since OpenHistoricalMap was last presented at State of the Map. In that time\, the project has grown into a major platform for mapping the history of the world: cities as they evol ve\, infrastructure that no longer exists\, changing landscapes\, shifting borders\, and many other layers of time. We are collecting it together in one place\, as open data\, in a spirit of cooperation.\n\nIn this talk we want to share where OpenHistoricalMap is today: what has been mapped so f ar\, how people contribute\, the tools that make historical mapping possib le\, and the projects that are building on top of OpenHistoricalMap data. We will go through real examples of historical mapping happening around th e world\, the workflows mappers are using and showcases\, and the changes we made to the editors and tooling so they work for OHM and not only OSM.\ n\nWe close with where the project is going next\, how new contributors ca n get involved\, and how the wider OSM community can support historical ma pping going forward. DTSTAMP:20260817T030503Z LOCATION:La Réunion SUMMARY:State of OpenHistoricalMap: mapping the world's history\, openly — Ruben Lopez Mendoza\, Minh Nguyễn URL:https://pretalx.com/sotm2026/talk/GJWH7J/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-82e373c5-53d9-5ac3-aaa5-848b8d6f3dc4@2024.stateofthema p.org DTSTART;TZID="+02:00":20260828T175500 DTEND;TZID="+02:00":20260828T181500 DESCRIPTION:The Federal Agency for Cartography and Geodesy (BKG) has a long history on the usage of OpenStreetMap data and plans to further set this data as a reliable source for geospatial products published by governmenta l bodies. The aim of the talk is to give an overview how NMCAs and federal institutions in Germany use the geospatial data collected and publicized by mappers around the globe and how we want to strengthen the interaction between public administration and the OSM community. DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:National Mapping and Cadastral agencies (NMCAs) and their relations hip with OSM: the example of the German BKG — Konstantin Krömer\, Pereg rina Blumhoff URL:https://pretalx.com/sotm2026/talk/H9VJ7S/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-d4256be5-87e7-5701-8113-a42ca8bc11e4@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T093000 DTEND;TZID="+02:00":20260829T101000 DESCRIPTION:La République des Cartes ("The Republic of Maps") is a French civic initiative launched by IGN\, the national mapping agency and fifteen partners to put cartography at the service of democratic participation\, territorial decision-making and popular education. \n\nIts first "Jour de la Carte" ("Map Day")\, held on 4 February 2026\, brought together around 115 grass-roots events across France: in town halls\, schools\, public lib raries\, design schools\, urban-planning agencies and citizen collectives. The 2027 edition aims at 500 - 1000 events and at extending the movement internationally.\n\nBehind the initiative is a simple intuition. Maps are everywhere in our daily lives. They shape what we see\, what we don't see\ , and the choices we make as citizens. Yet most people never get to make a map\, question one\, or discuss one collectively. La République des Cart es gathers a broad coalition to change that - cartographers\, designers\, elected officials\, teachers\, researchers\, urban planners\, and partners ranging from Banque des Territoires\, Vinci Group (La Fabrique de la Cit é and Leonard)\, OVHcloud\, Ubisoft\, DocaPoste\, LaPoste\, NoDesign and a lot more.\n\nThis talk will share what we learned from the first edition \, the strategy and ambitions for 2026-2027 and the open-licensed tools th at have been built and tested in the field - including a 60-minute discuss ion workshop\, an exhibition kit and a collaborative board game.\n\nFor th e OpenStreetMap community\, this is also an invitation. The 2027 edition w ill be meaningful if it connects more with the people who actually make ma ps. The worldwide OSM community is among the most legitimate\, organised a nd demanding of those communities\, and we are explicitly looking for amba ssadors and partners who would like to bring a Map Day event to their terr itory\, in their own language\, in their own way.\n\nThe 40-minute slot wi ll be split: about 20 minutes for the presentation\, 20 minutes for a part icipatory segment based on the first part of our "Map that we need" worksh op\, so that the audience leaves with a concrete tool - and ideally a few new ideas about which maps the OSM ecosystem could help bring to life. DTSTAMP:20260817T030503Z LOCATION:Guadeloupe SUMMARY:The Republic of Maps : Together\, let's unlock the power of maps to build democracy — Matthieu Chatry URL:https://pretalx.com/sotm2026/talk/CWT8FR/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-a9614cba-4252-5c5e-8a36-b9b8dd54a7ee@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T093000 DTEND;TZID="+02:00":20260829T095000 DESCRIPTION:LeBonTag is an open-source web application that allows organiza tions to review OpenStreetMap changes before integrating them into their o wn datasets.\n\nOriginally initiated by Montpellier Méditerranée Métrop ole to support its internal data workflows\, LeBonTag enables a human-in-t he-loop process to monitor\, inspect\, and validate OSM edits before integ ration. DTSTAMP:20260817T030503Z LOCATION:La Réunion SUMMARY:Reviewing OSM Changes Before Integration: Introducing LeBonTag — Bruno Béguin\, Mathieu Ambrosy URL:https://pretalx.com/sotm2026/talk/X7EKQG/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-b8114bf7-cf22-531f-8d92-6fa61382b0f2@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T093000 DTEND;TZID="+02:00":20260829T095000 DESCRIPTION:This presentation introduces a new step-by-step approach that a ims at helping to fix the incompleteness and heterogeneity of the OSM data . \nIt first focuses on the OSM features that comprise the backbone of hom ogeneous OpenStreetMap data\, before broadening the perspective to include other objects: the nodes representing settlements\, the main road connect ing them to the main road network\, as well as the residential area showin g the extent of the settlement.\nThe OSM Skeleton project aims to identify all missing\, inaccurate\, incomplete\, or obsolete objects in the OSM da ta backbone in order to resolve inconsistencies. OSM Skeleton uses externa l data to identify the missing features and performs spatial analysis\, cr ossed features and various metrics to analyze incompleteness and heterogen eity. For instance\, the approach introduces a hybrid analytic feature tha t combines residential and street network areas. \nEach type of issue\, wh ether confirmed or potential\, is represented by a specific layer at natio nal scale and can be resolved by clicking to access the relevant area in a n OSM editor to modify the existing OSM data using the available imagery. The most significant issues are displayed at all scales\, while minor ones are displayed at higher zoom levels.\nAll the issues can be processed by a click giving access to a webpage providing mapping instructions and butt ons to open the area in either JOSM or iD. Forecasting next mapping steps involving field mapping\, the OSM Skeleton approach also performs an analy sis of the completeness of points of interest (POIs) for cities and towns. \nInitially developed in two regions of Africa and South America\, the me thodology reveals regional or national patterns\, highlighting significant contrasts between regions and between small towns with the same region. D aily updated statistics categorized by issue or first-level administrative division provide a complete overview of the issues at hand. \nTechnically \, the OSM Skeleton approach uses standard PostgreSQL-generated Open Geosp atial Consortium (OGC) layers. These layers can be used on ready online ma ps provided by a spatial data infrastructure (SDI) or in any OGC-compatibl e client. All layers can be downloaded natively in various GIS formats. Ra ther than relying on remote mapping\, OSM Skeleton aims to expand local OS M activities\, including imagery and field mapping\, as well as the local promotion of enhanced\, complete OSM data. DTSTAMP:20260817T030503Z LOCATION:Corse SUMMARY:OSM Skeleton: Completing the Backbone of OSM Data — Séverin Ménard URL:https://pretalx.com/sotm2026/talk/8SKDAR/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-ca8fbe72-750b-57f3-83ea-4f0be5947c12@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T093000 DTEND;TZID="+02:00":20260829T103000 DESCRIPTION:Did you know JOSM can do many things better than your favorite Desktop GIS application? Imagine replacing your Desktop GIS with JOSM that 's it :). Some JOSM Aha! moments.\n\nIn this workshop we will explore many JOSM tips that improve mapping both within OpenStreetMap and beyond. Come with a JOSM tip and use case if you can but this is not required as there will be more than enough to share and learn from everyone. DTSTAMP:20260817T030503Z LOCATION:Tahiti SUMMARY:Awesome JOSM: tips that beat every Desktop GIS and AI — Enock Set h Nyamador URL:https://pretalx.com/sotm2026/talk/JUPZXH/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-a619bfbd-7c49-5bd6-a396-ce209a669448@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T093000 DTEND;TZID="+02:00":20260829T100500 DESCRIPTION:This talk will introduce the OSM Science/SotM Academic Track co ncept\, review its history and past editions and will discuss the current state of OSM Science as reflected in the talk included within this track DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:OSM Science 2026: Introduction — Yair Grinberger URL:https://pretalx.com/sotm2026-osm-science/talk/PAF7YC/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-ac18201d-6db7-55f8-b7fa-8b7a5f8f7896@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T100500 DTEND;TZID="+02:00":20260829T102500 DESCRIPTION:The Outdoors Group in France has a selfish purpose: help create OSM-based maps that we and our fellow outdoors practitioners and professi onals can safely use to plan and carry out our favorite activities. We ar e end users\, originally mostly hikers and mountain bikers\, who came to O SM to create better maps and who discovered on the way that this will requ ire other classes of end users to adopt OSM or at least find their way aro und it: route operators\, tourism offices\, land managers\, mountain rescu e services\, etc.\n\nThis talk reports on our collective successes and rem aining challenges in turning OSM-based maps into reliable and safe maps f or outdoors activities in France and onboarding other end-users. Successes include going from zero to 30.000 km of node networks in a few years\, ma intaining route continuity above 90% on ~200.000 km of hiking routes\, and starting collaborations with a few route operators. The challenges that w e report on include better engagement of various categories of end users s uch as local institutions and land managers. Analyzing these challenges di rects us toward a few irritants that we need to manage to make OSM more i nclusive towards them\; this includes some mapping principles and semantic models in OSM\, the need for better tooling for relation management\, and perhaps additional governance bodies.\n\nIn addition to reporting on our successes and remaining challenges\, the goal of this talk proposal is als o to recruit participants for a BOF session with outdoors mappers and map developers from other countries\, possibly with an actual outdoors mapping session in or near Paris DTSTAMP:20260817T030503Z LOCATION:La Réunion SUMMARY:Creating maps for the outdoors community in France: successes and c hallenges — StC URL:https://pretalx.com/sotm2026/talk/QJJS3X/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-34b838fa-223a-5b60-9589-f302640e2327@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T100500 DTEND;TZID="+02:00":20260829T102500 DESCRIPTION:OSM for Cities is a web platform that makes OpenStreetMap usabl e for anyone exploring a city's data. Search any city\, browse 200+ datase t categories\, and download GeoJSON filtered by administrative boundaries. No GIS expertise required.\n\nWhen a planning team worked on a bus networ k reevaluation in Mexico City in the late 2000s\, teams GPS-tagged informa l bus stops and routes\, data dying in proprietary reports. At that time\, OpenStreetMap was just emerging and didn't have the coverage yet. But it offered the perfect infrastructure to make this data reusable and useful f or local communities\, if only teams had known about it.\n\nToday\, OSM h as grown\, but accessing it for city-level planning remains challenging. T ools exist\, but extracting city datasets filtered by administrative bound aries is still difficult for non-technical teams. OSM for Cities closes th at gap\, with categories spanning schools\, healthcare\, cycling infrastru cture\, and transit\, backed by a self-hosted Overpass instance for global coverage.\n\nThis open-source project invites planners\, researchers\, lo cal mappers and city officials to use the platform and share feedback. Wha t would you do with easy access to your city's OSM data? We want to hear t he use cases we haven't thought of yet\, and the gaps we should be filling . DTSTAMP:20260817T030503Z LOCATION:Corse SUMMARY:OSM for Cities: Breaking the data waste cycle — Vitor George URL:https://pretalx.com/sotm2026/talk/YFBLXL/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-cd9f3cb2-8dfd-5e51-8b07-5841d3a3dade@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T100500 DTEND;TZID="+02:00":20260829T101000 DESCRIPTION:This study presents a reproducible methodology for detecting in formal settlements using OpenStreetMap building footprint data. By integra ting urban morphology and topology within a Python-based workflow and leve raging OSMnx for data extraction\, the approach enables fine-scale spatial analysis in data-scarce environments. The method is tested across three c ase studies in the Global South\, demonstrating how OpenStreetMap can supp ort urban research\, comparative analysis\, and data-driven insights into informal settlements relevant to SDG 11. DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:Mapping Informal Settlements with OpenStreetMap Data: Integrating U rban Morphology and Topology for Slum Detection — Lucia Mabel van der He ijden URL:https://pretalx.com/sotm2026-osm-science/talk/X89Y8Y/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-cfd3ad42-8e2a-54a3-a582-059d207b71d6@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T101000 DTEND;TZID="+02:00":20260829T101500 DESCRIPTION:The presentation aims to demonstrate how the collaborative and open data routinely collected in OSM can serve as a basis for calculating indicators designed to assess the potential of a green space to promote th e health of city dwellers\, across its various dimensions (physical\, soci al\, mental and environmental health). DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:MyGreenSpace : Relying on Open Data to Characterize the Health Po tential of Urban Green Spaces — Marion Porcherie URL:https://pretalx.com/sotm2026-osm-science/talk/KFDLAR/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-8ec09920-4330-5d96-8fb3-ac6fa563d317@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T101500 DTEND;TZID="+02:00":20260829T102000 DESCRIPTION:With this study we aim to quantify the amount of mappable indoo r space in European cities. On this base we can assess the completeness of indoor data in OSM. We operate under the premise that only publicly acces sible spaces are relevant for inclusion in the OSM database. Thus\, we fir st identify candidate buildings based on building tag values and spatially realated amenities. We then employ values derived from Neufert design gui delines to estimate the portion that is actually publicly accessible. The method is tested with four European cities\, Pecs\, Dresden\, Budapest and Berlin\, and verified at random with selected buildings. DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:Indoor Mapping Potential in OpenStreetMap: Estimating the Amount of Publicly Accessible Indoor Spaces Across European Cities — Helga Tausch er\, Nomin Enkhtamir URL:https://pretalx.com/sotm2026-osm-science/talk/CTNPQJ/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-fdf004ad-3d66-5d5d-9ac5-0c27270b5f89@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T102000 DTEND;TZID="+02:00":20260829T102500 DESCRIPTION:This work examines OpenStreetMap as an open interoperability la yer for Alpine torrent control structures (e.g.\, check dams\, bed sills)\ , aligning the waterway=check_dam tagging schema with published hydro-geom orphic risk indices (e.g.\, PFI\, MPi\, SCR). A snapshot across European c ountries reveals very low schema adoption and attribute completeness\; a c onflation pilot against the regional database of the Friuli-Venezia Giulia Region (Northeastern Italy) establishes the first OSM-to-cadastre benchma rk in this domain. DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:Towards an OpenStreetMap-based open database of transversal torrent control structures in the Alpine arc — Alessandro Sarretta URL:https://pretalx.com/sotm2026-osm-science/talk/TDMGNZ/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-c7ce58e3-2173-5489-a080-ce929168c1a9@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T102500 DTEND;TZID="+02:00":20260829T103000 DESCRIPTION:This paper presents City in the Rhythm of Colours and Sounds\, a project combining OpenStreetMap\, soundscape studies and Colouring Citie s-inspired building data. Using selected Polish towns as case studies\, it links OSM-based spatial layers with field soundwalks and participatory ob servation. It shows how open mapping can support multisensory civic cartog raphy\, urban education and social engagement. The project highlights Open StreetMap as both a technical geodatabase and a community platform for und erstanding everyday urban experience. DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:Mapping the City in the Rhythm of Colours and Sounds: OpenStreetMap as a Basis for Multisensory Civic Cartography — Paweł Struś URL:https://pretalx.com/sotm2026-osm-science/talk/EUWM8V/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-8be00561-a7b5-5b3f-9d1c-b57b9a8c4b24@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T111500 DTEND;TZID="+02:00":20260829T113500 DESCRIPTION:In this talk\, we will present the open source routing engine M OTIS.\n\nMOTIS provides efficient profile-based real-time routing on OpenS treetMap street networks\, public transit networks as well as intermodal d oor-to-door routing combining different modes of transportation\, includin g sharing mobility as well as flexible and on-demand public transport offe rings.\n\nWith its "batteries included" approach\, MOTIS offers everything from geocoding to displaying routing results on its own vector tiles on a global scale with minimal memory usage which makes it a perfect fit for t he Transitous project. DTSTAMP:20260817T030503Z LOCATION:Guadeloupe SUMMARY:MOTIS (open source routing engine) — Felix Gündling\, Robin Durner URL:https://pretalx.com/sotm2026/talk/LT3DRY/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-9ac70ab8-f7d3-5d2f-a2f2-f4508c5682cc@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T111500 DTEND;TZID="+02:00":20260829T113500 DESCRIPTION:Over 10 years ago\, the French Institute of Geographic Informat ion (IGN) created "Minecraft on demand"\, a web service that uses real geo graphical data to build playable worlds for voxel games such as Minecraft (worlds made of small unit cubes). After 135\,000 voxel world generations\ , including more than 6\,000 from OSM data\, the service turned out to be limited\, missing flexibility and using only a small fraction of OSM data. The institute capitalized on its experience to design a new standalone an d flexible tool able to exploit the full richness of OSM data and much mor e.\n\nAs many generation constraints as possible have been removed. For in stance\, size of created world is only limited by game format and not anym ore by memory size. The extremely high configurability makes this tool ver y versatile. Decisions are driven by the user’s creativity and not by th e software. All the tasks\, ranging from data loading\, processing\, all t he way to rendering are described through a human readable configuration f ile\, so that even non-programmers can easily fine-tune their pipeline. Th is new tool can be seen as the "Swiss Army knife" of geographical data vox elization (conversion of data into voxel worlds).\n\nThe tool is open sour ce\, modular and can be extended with Java modules. It paves the way for n ew community-maintained features\, such as support for new geographical da ta formats\, processing algorithms\, or voxel formats. Consequently\, the tool has the potential to natively manipulate any type of data (vector\, r aster\, point cloud...) originating from any provider (OSM Overpass\, OGC WFS/WMS\, local files...)\, process it in various ways\, and create any vo xel-based format as a result (Luanti\, Minecraft\, Lego...). For instance\ , it is possible to create a Luanti world with terrain elevation imported from OpenDEM\, and any feature from OSM (road network\, buildings\, land u se...).\n \nWhile most of the existing tools are focused on "fun" or educa tional usages\, this one makes no assumption about the user's intent\, and can be used for any purpose\, including:\n- Immersive exploration (e.g. f or citizen participation)\n- Rebuild in context (e.g. of a monument)\n- Th ematic rendering (e.g. based on a tag such as restaurant's cuisine)\n- Mix ing/custom sources (e.g. with local files)\n- And many more to discover! DTSTAMP:20260817T030503Z LOCATION:La Réunion SUMMARY:A Swiss Army knife for geographical data voxelization — Pierre-Yv es Rollo\, Théo SZANTO URL:https://pretalx.com/sotm2026/talk/E3WQWG/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-7e3927cc-bc8e-5e0f-b5bd-d6b09fd246a9@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T111500 DTEND;TZID="+02:00":20260829T113500 DESCRIPTION:The Centipede-RTK projects aims to provide affordable centimete r-level GNSS positioning for uses heretofore limited to professional use ( surveyors\, famers...)\, due to its cost.\n\nUses: better positioning and earlier updates in OSM\, for example after roadworks not yet visible on ae rial photography: curb surfaces\, new roods and roundabouts\, new roadside equipment\, etc.\n\nThere are several ways to use the network and extend it\, either with DIY or commercial receivers.\n\nThe project needs ground stations to establish a reference network. It currently enjoys over 1100 b ase stations\, mostly in France and Hungary\, and is fast spreading all ov er the world. DTSTAMP:20260817T030503Z LOCATION:Corse SUMMARY:Centipede-RTK with RTKBase and Millipede: centimeter-level GNSS pos itioning — Pierre Beyssac URL:https://pretalx.com/sotm2026/talk/KVZZWR/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-43bddaca-5aa0-5507-b849-4624ca68218b@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T111500 DTEND;TZID="+02:00":20260829T121500 DESCRIPTION:Publishing a map on a website can seem like a daunting task. It does not have to be! In this workshop you will learn everything you need to know to publish a map that uses OpenStreetMap on a website.\n\nYou will get an overview of all the concepts involved as well as the tools that ar e available to you (e.g. vector tiles\, tile archive formats such as PMTil es\, MapLibre styles\, Maputnik). As a bonus\, you will learn how you can create your own vector tiles from raw OSM data using Planetiler. DTSTAMP:20260817T030503Z LOCATION:Tahiti SUMMARY:From Bits to Pixels: Introduction to Map Making with OSM Data and M apLibre — Bart Louwers\, Yuri Astrakhan URL:https://pretalx.com/sotm2026/talk/XLETVQ/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-2cf0b46d-9cad-53c4-9182-5c9a84897c73@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T111500 DTEND;TZID="+02:00":20260829T115000 DESCRIPTION:CartAGen is an open source Python library that highly facilitat es the use of map generalisation algorithms. This new tool could change ho w basemap producers that rely on OSM data design their maps. DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:CartAGen\, an innovative tool to generalise OSM data — Paul Bourc ier\, Guillaume Touya URL:https://pretalx.com/sotm2026-osm-science/talk/V9ASNX/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-126269c4-f202-5ae9-a8c7-1609371e10d0@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T115000 DTEND;TZID="+02:00":20260829T121000 DESCRIPTION:There are several FOSS solutions for routing on OSM road data a t planet scale\, but until recently we lacked an intermodal router at a si milar scale which also takes public transport and rental vehicles into acc ount. Transitous is a community-run public transport routing service built entirely with Free Software and Open Data to fill this gap. Started in 20 24 it meanwhile covers more 300\,000 concurrent trips in over 60 countries . DTSTAMP:20260817T030503Z LOCATION:Guadeloupe SUMMARY:Transitous - Free and Open Public transport routing — Volker Krau se URL:https://pretalx.com/sotm2026/talk/3WLKJ9/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-f957f913-d501-5967-b81c-2dd6380c3930@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T115000 DTEND;TZID="+02:00":20260829T121000 DESCRIPTION:OSM2World is an open source tool which produces detailed 3D mod els from OpenStreetMap data. In some parts of the world\, OSM has reached the necessary level of detail for rich 3D scenes\, containing outdoor and indoor views of buildings\, roads with lane details\, urban infrastructure \, and many other elements.\n\nThis talk introduces the capabilities of OS M2World\, with a particular focus on features which were added recently. T hese include:\n\n* The new **web frontend** which lets you try out OSM2Wor ld without a local installation\n* Easy to use **3D tile generation** and greatly improved **glTF support**\n* Additional backends such as **GeoDesk ** and **OSM JSON**\n* The **library interface** which makes it easy for a pplications on the JVM or in the browser to integrate OSM2World's capabili ties.\n\nWe will also explore use cases of OSM2World in different domains. The session is intended to be suitable for visitors learning about OSM2Wo rld for the first time as well as those interested in staying up-to-date a bout new developments. DTSTAMP:20260817T030503Z LOCATION:La Réunion SUMMARY:OSM2World: 3D models from OpenStreetMap data — Tobias Knerr URL:https://pretalx.com/sotm2026/talk/XQUCJM/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-548cb5e7-b33d-568c-80ae-c73af0d4fec2@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T115000 DTEND;TZID="+02:00":20260829T121000 DESCRIPTION:As a follow-up of the European Cycling Declaration\, DG MOVE re quested the European standardisation body CEN to pave the way for the stan dardisation of the digital description of cycling infrastructure.\nTaking a new approach to CEN standardisation\, the experts group behind the Cycli nfra project decided to build from the existing. Their first playground: O penStreetMap and its data on cycling infrastructure and cycle parking. The y explored and extracted the data from OSM to conduct research on European baseline for cycling infrastructure. \nConsidering that a large amount of European cities use OpenStreetMap and open-source tools weaved into it fo r their GIS data\, it would only be logic that the future CEN standards ar e strongly interoperable with OSM and its most frequently used tags for cy cling.\nIn this session\, we will present the Cyclinfra project\, its meth odology\, how OSM will be used to build CEN standards\, and how you can co ntribute! DTSTAMP:20260817T030503Z LOCATION:Corse SUMMARY:How OSM inspire CEN standards for cycling infrastructure — Tu-Tho Thai URL:https://pretalx.com/sotm2026/talk/SFXJZM/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-14ef08ee-83fb-5d3c-8d07-f5e50a12abb3@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T115000 DTEND;TZID="+02:00":20260829T122500 DESCRIPTION:OpenStreetMap centerlines carry enough topological\, geometric and semantic information to reconstruct lane-level road networks — if in terpreted correctly. This study proposes treating OSM centerlines as struc tural representations of dominant traffic flow rather than geometric midli nes\, and reconstructs detailed lane networks and 2D areal road geometries through a hierarchical\, connectivity-driven process guided by topology\, geometry\, and OSM tag semantics. Applied to Delft\, the Netherlands\, th e framework produces a complete\, functionally typed lane-level network an d seamless areal road representations covering diverse urban road configur ations\, validated against satellite imagery. DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:Reconstructing A High-detailed Lane-Level Road Network Model from O penStreetMap: A Connectivity-Driven Approach — Chengzhi Rao URL:https://pretalx.com/sotm2026-osm-science/talk/KUEYVB/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-3ef47ec7-963b-5a8f-b7a9-cfaabf6a25f0@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T122500 DTEND;TZID="+02:00":20260829T124500 DESCRIPTION:OSRM was once the go-to routing engine for anyone working with OpenStreetMap data: fast\, purpose-built\, and deeply aligned with OSM’s data model. But in recent years\, the project lost momentum. Issues piled up\, pull requests stalled\, and the community started asking: is anyone still home?\n\nThis talk shares early lessons from a renewed effort to cha nge that\, presented by OSRM’s founder and BDFL.\n\nWe’ll give an hone st account of where OSRM stands today: what works\, what doesn’t\, and w hat the broader routing ecosystem has taught us. More importantly\, we’l l share what the revitalization effort looks like in practice: a renewed c ommitment to OSM-first routing philosophy\, a public roadmap\, a lower con tribution barrier\, and a clearer community voice.\n\nAt the heart of this renewal is a shift in technical ambition. OSRM has always excelled as a h igh-performance server engine\, but routing doesn’t only happen in data centers. Field workers\, humanitarian responders\, cyclists navigating wit hout connectivity: they all need routing on the device in their pocket. We ’ll outline early work toward a single codebase that serves both worlds\ , powering large-scale server deployments and running efficiently on handh eld devices\, without splitting the project or compromising OSM fidelity.\ n\nOSRM’s core strength has always been its refusal to treat OSM as just another data format. The routing profiles\, the handling of access tags\, the speed model: all of it is designed around how OSM actually works. Tha t advantage is worth fighting for\, and worth bringing to every platform i t can reach.\n\nAttendees will leave with a clear picture of OSRM’s curr ent state\, the technical roadmap ahead\, and concrete ways to get involve d. DTSTAMP:20260817T030503Z LOCATION:Guadeloupe SUMMARY:OSRM is Back: Revitalizing the OSM-Native Routing Engine — Dennis Luxen URL:https://pretalx.com/sotm2026/talk/ZR8RTX/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-7831a10b-36b9-57df-8635-91fe774e2472@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T122500 DTEND;TZID="+02:00":20260829T124500 DESCRIPTION:Street-level imagery has a huge potential for OpenStreetMap map pers. Panoramax is a project to collect and manage street-level imagery\, implemented as free and opensource software. It allows the crowdsourcing o f images\, which are then usually openly licensed.\n\nNowadays\, Panoramax allows 2D images management and visualization : images are located at a s pecific location\, and displayed in a 2D visualization widget.\n\nWe are w orking on **full 3D support for Panoramax** : enabling point cloud visuali zation and images simultaneously\, integrating panoramic images or oriente d images inside the 3D world\, and adding 3D visualization capabilities to Panoramax.\n\nWe present the current state of work and what this new appr oach opens in terms of new usages for OSM mappers. DTSTAMP:20260817T030503Z LOCATION:La Réunion SUMMARY:Immersing Panoramax in the 3D world — Vincent Picavet URL:https://pretalx.com/sotm2026/talk/YEGCPU/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-819e490d-e57c-50ef-88a0-dcf09e320b38@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T122500 DTEND;TZID="+02:00":20260829T124500 DESCRIPTION:The Fédération des pros d’OpenStreetMap (FPOSM) is the Fren ch non‑profit organization that unites companies and professionals whose services and tools are built on OpenStreetMap\, and who are committed to keeping OpenStreetMap a healthy digital commons. \n\nLaunched during State -of-the-Map France 2023\, the FPOSM now gathers 28 French companies with e xpertise in creating\, using\, enhancing and ensuring the quality of OSM d ata on topics such as : mobility\, routing and accessibility\, infrastruc tures and power grids\, urban planning\, food and agriculture\, tourism\, local business\, community outreach and more. Members also develop and mai ntain software around OpenStreetMap\, such as Clearance\, Podoma\, LeBonTa g\, GridInspector.\n\nThe FPOSM is the worldwide most advanced structured federation of OSM professionals directly coming from and complementary to the volunteer community and local chapters. \n\nWe will share how and why FPOSM was created\, and how we are committed to preserve OpenStreetMap’s ethos and guidelines.\n\nWe will also talk about the FPOSM’s collective work:\n\n- OSM advocacy towards public authorities\n- The practical bookl et « Everything you need to know about the ODbL licence\, available in F rench and English.\n- The guide « OpenStreetMap and Territories »\, wh ich brings together a wide range of testimonials from French public sector stakeholders who have used OSM across their territories.\n- The organizat ion of events like « OpenStreetMap & territoires » that connect profes sionals and public actors.\n\nWe’ll wrap up with what we’ve learned\, what challenges we are facing\, and some ideas for starting similar groups elsewhere\, so professional ecosystems grow alongside and actively suppor t local OSM communities. DTSTAMP:20260817T030503Z LOCATION:Corse SUMMARY:Making a living on OSM by nurturing the commons : inside the Frenc h Federation of OSM professionals — Marina Petkova\, Florian Lainez URL:https://pretalx.com/sotm2026/talk/WGMV3T/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-66708105-fa60-5247-9e33-43e5b3256592@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T122500 DTEND;TZID="+02:00":20260829T130000 DESCRIPTION:We present OSM Road Monitor\, an approach towards a near-real-t ime system that cross-validates OpenStreetMap road updates against remote sensing imagery to detect and assess changes in the road network. We discu ss three categories of computer vision approaches for road change detectio n and demonstrate a proof of concept on a selected set of orthophotos\, wh ere we showcase that a SpaceNet5-winning segmentation ensemble can success fully identify newly constructed and demolished road segments. DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:Towards a Real-Time Monitoring System for the Road Network Based on OpenStreetMap and Remote Sensing Data: OSM Road Monitor — Carla URL:https://pretalx.com/sotm2026-osm-science/talk/HYKXYK/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-42668bf8-6c33-572c-bae5-e747ffb739fc@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T143000 DTEND;TZID="+02:00":20260829T145000 DESCRIPTION:Pardon our dust as OpenStreetMap’s core software projects und ergo some renovations! Now a year into the core software roadmap that we d ebuted in Manila and Dundee\, we’ll review some highlights from the past year in the openstreetmap-website project (the Web frontend and API)\, fo llowed by a preview of things to come in the next several months. We’ll go beyond our monthly summaries on the forum to offer a look into the day- to-day experience of contributing to these projects and how it has improve d over the past year. DTSTAMP:20260817T030503Z LOCATION:Guadeloupe SUMMARY:Construction ahead — Minh Nguyễn\, Pablo Brasero\, Ruben Lopez Mendoza URL:https://pretalx.com/sotm2026/talk/ZXBHXD/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-d54260d1-3488-5888-9d48-06f114849a11@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T143000 DTEND;TZID="+02:00":20260829T153000 DESCRIPTION:This panel discussion is about understanding motivations and ob jectives behind everyone's journey with OpenStreetMap. The goal of the pan el discussion is to collect ideas and suggestions to draft a survey to be disseminated among the whole OSM community and better understand what moti vates mappers to do what they do best! DTSTAMP:20260817T030503Z LOCATION:La Réunion SUMMARY:Why do you contribute to OSM? — Michael Montani URL:https://pretalx.com/sotm2026/talk/GXXCFE/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-7485a6a8-23ff-5259-bc68-1350d3079f52@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T143000 DTEND;TZID="+02:00":20260829T145000 DESCRIPTION:Lightning talks are short presentations (maximum 5 minutes) abo ut a topic related to OpenStreetMap. DTSTAMP:20260817T030503Z LOCATION:Corse SUMMARY:Lightning Talks II — SotM Working Group URL:https://pretalx.com/sotm2026/talk/LDQTKQ/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-51775374-c841-55e9-a5c9-25f5841b21c1@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T143000 DTEND;TZID="+02:00":20260829T153000 DESCRIPTION:This beginner-friendly workshop introduces the ohsome-dashboard as an accessible entry point to OpenStreetMap analytics — no coding ski lls required. Participants will learn how to explore OSM data through hand s-on exercises\, developing their own ohsome-filters with the help of the OSM-Wiki and TagInfo. These ohsome-filters are then applied to user-select ed regions to investigate aspects such as attribute completeness\, data cu rrentness\, and mapping activity. The workshop concludes with an outlook t owards more advanced analyses\, including changeset-based exploration and user statistics. \n\nAdditionally\, an overview on the topic is planned a s a talk. DTSTAMP:20260817T030503Z LOCATION:Tahiti SUMMARY:Introduction to OSM Analytics with ohsome — Rafael Troilo\, Micha el Auer URL:https://pretalx.com/sotm2026/talk/EKTQAD/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-3d0935c0-1822-5d0d-9213-70ba1d57545b@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T143000 DTEND;TZID="+02:00":20260829T150500 DESCRIPTION:This talk presents how large-scale mapping in _OpenStreetMap_ e nabled the creation of high-resolution tools to measure and reduce geograp hic barriers to healthcare in rural Madagascar\, from optimizing community health worker deployment to planning door-to-door interventions. Building on a district-level pilot\, we scaled this approach across multiple regio ns and estimated the resources required for nationwide mapping\, highlight ing how OSM can serve as a foundation for data-driven health system planni ng and improved access to care. DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:Mapping and using OpenStreetMap to Improve Geographic Access to Hea lthcare in Rural Madagascar — Andres Garchitorena URL:https://pretalx.com/sotm2026-osm-science/talk/VQFXXL/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-127910b9-464c-5831-b6ff-8aa96aec3a6e@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T150500 DTEND;TZID="+02:00":20260829T152500 DESCRIPTION:As a mapper\, we spend hours micro-mapping surface types\, tact ile paving\, complex building geometries or trees. But when you check the map\, they are invisible.\n\nLegacy web cartography forces a compromise:\n **To keep standard Vector Tiles (MVT) small enough for network transfer\, rendering pipelines systematically drop niche tags and simplify geometries **.\n\nMapLibre is now the default vector renderer on the OpenStreetMap fr ont page. Moving from static rasters to interactive vectors is the next st ep in improving this experience.\nTo make the front page a true 1:1 reflec tion of the database\, we must eliminate this data-loss.\n\nThis talk cove rs the MapLibre technical roadmap for rendering the complete OSM tag dicti onary directly in the browser. We detail the integration of two technologi es:\n- **MapLibre Tile (MLT)**: A vector data compression specification th at reduces bandwidth\, allowing the delivery of heavy\, unfiltered OSM dat asets to the client.\n- **WebGPU**: Shifting the computational bottleneck from the CPU to the GPU\, enabling browsers to render massive MLT payloads \, dynamic styling\, and 3D geometries at 60fps.\n\nThe presentation featu res a live\, split-screen benchmark using dense data to compare the older raster maps vs legacy MVT/WebGL vs the MLT/WebGPU pipeline.\nAttendees wil l see how upgrading the shared open-source infrastructure is necessary to visualize **every** mapper’s contribution. DTSTAMP:20260817T030503Z LOCATION:Guadeloupe SUMMARY:Upgrading the OSM Front Page — Frank Elsinga URL:https://pretalx.com/sotm2026/talk/EFTDVX/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-412c1198-aae8-54de-a797-3b57993db2b6@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T150500 DTEND;TZID="+02:00":20260829T152500 DESCRIPTION:Access to affordable\, nearby daycare is a pressing concern for many parents\, particularly young mothers who seek to continue their educ ation or participate in the workforce. Yet\, in many parts of Africa\, spa tial data on childcare facilities remains sparse\, outdated\, or completel y unavailable.\nThis talk will present a community mapping initiative that aims to address this data gap by identifying and mapping daycare faciliti es in a Nairobi neighbourhood using OpenStreetMap tools. Through a partici patory process involving local youth and community groups\, the project co llects geolocated data on operational daycare centres\, including their na mes\, services\, capacity\, contact information\, and safety features.\nTo achieve this\, the project utilises QGIS for planning\, digitisation\, an d visualisation of the data layers\, while QField is used for efficient\, mobile-based field data collection. With the JOSM plugin in QGIS\, the cle aned and verified datasets are uploaded directly to the OSM platform\, ens uring that the information becomes globally accessible and contributes to the growing body of open data supporting African communities.\nThe use of these open-source tools enables community members\, including those with l imited technical backgrounds\, to engage in the full mapping workflow. The project ultimately empowers local mappers\, supports better decision-maki ng for parents\, and enables local leaders and planners to identify servic e gaps and allocate resources more effectively.\nIn alignment with the con ference theme\, this initiative showcases how grassroots open mapping can connect communities to essential services\, promote gender equality\, and foster sustainable collaboration among residents\, developers\, government officials\, and open data advocates.\n\nKeywords: childcare\, OpenStreetM ap\, participatory mapping\, QGIS\, QField\, open data\, Nairobi\, YouthMa ppers.\n\nKey Learning Outcomes:\n• How to use QGIS and QField to implem ent a local community mapping project\n• Publishing collected data to Op enStreetMap using the JOSM plugin\n• Engaging local stakeholders\, espec ially women and youth\, in a participatory mapping approach\n• Practical lessons from mapping social infrastructure that serves vulnerable populat ions DTSTAMP:20260817T030503Z LOCATION:Corse SUMMARY:Putting Childcare on the Map: Supporting Parents in Nairobi Through OpenStreetMap — Maurine Oyugi URL:https://pretalx.com/sotm2026/talk/L9CZPJ/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-d1be6694-27b9-5951-83f7-dba9d7a6a41a@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T150500 DTEND;TZID="+02:00":20260829T154000 DESCRIPTION:This paper revisits humanitarian mapping in OpenStreetMap from a critical socio-technical perspective. Since the 2010s\, initiatives like the Humanitarian OpenStreetMap Team (HOT) have mobilized global volunteer s for crisis mapping\, while raising concerns about epistemic inequalities and the marginalization of local knowledge. Focusing on the HOT Tasking M anager\, the study examines how participation is structured through platfo rm design\, enabling collaboration but also embedding standardization and governance logics. Drawing on data ethnography and infrastructure studies\ , it reassesses earlier critiques and their metabolization. The paper argu es that humanitarian mapping today oscillates between empowerment and tech nocratic rationality amid ongoing data inequalities. DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:Inter-Faceing the Critique – A Socio-technical Perspective on Hum anitarian Mapping with the HOT TM — Charlotte Liebel URL:https://pretalx.com/sotm2026-osm-science/talk/XHEEYA/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-f734ad77-455d-5dca-8867-f1082dfd26a0@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T154000 DTEND;TZID="+02:00":20260829T160000 DESCRIPTION:Running OpenStreetMap.org services in the age of AI has introdu ced some interesting\, surprising\, and occasionally amusing operational c hallenges.\n\nThis talk offers an inside look at the challenges faced by t he Operations Team when running open\, permissive services in 2026. How do we keep OpenStreetMap welcoming to mappers\, developers\, researchers\, a nd community tools\, while protecting shared infrastructure from accidenta l misuse\, excessive automation\, and deliberate abuse?\n\nThrough real-wo rld operational stories\, light audience participation\, and hopefully no live incident response\, we will explore the balance between openness\, re silience\, and sustainability - and why keeping OpenStreetMap open sometim es requires a sense of humour\, a good graph\, and the occasional rate lim it. DTSTAMP:20260817T030503Z LOCATION:Guadeloupe SUMMARY:Running OpenStreetMap.org in the Age of AI — Grant Slater URL:https://pretalx.com/sotm2026/talk/7ED7WQ/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-df477763-6fc5-5ce2-b011-9ec1f537a783@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T154000 DTEND;TZID="+02:00":20260829T160000 DESCRIPTION:Our university won a call for proposals from the French ministr y of higher education\, research and space\, to develop program regarding disability and inclusion in higher education and created the [“Tous EGO ”](https://www.univ-brest.fr/fr/page/tous-ego-ensemble-pour-grandir-et-o uvrir) program.\nOne of the initiatives is the [university mapping project ](https://blogs.univ-brest.fr/ubo-durable/2025/11/18/tous-ego-cartographio ns-notre-universite/)\, to help students navigate the campus\, especially those with disabilities. The decision was made to use OpenStreetMap\, to c reate an interactive map of the university\, indoor and outdoor\, thanks t o [Teritorio](https://www.teritorio.fr/en/) a french commercial enterprise in the social and solidarity economy providing us technical solutions usi ng OpenStreetMap. DTSTAMP:20260817T030503Z LOCATION:La Réunion SUMMARY:"Tous EGO" University mapping project — Gwenaëlle Chalm URL:https://pretalx.com/sotm2026/talk/GFUTGL/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-9d9e0308-083b-5c3b-8a36-1faec567b580@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T154000 DTEND;TZID="+02:00":20260829T160000 DESCRIPTION:Mapy.com is a widely used mapping application with a strong foc us on hiking and cycling\, used daily by millions of people.\n\nIt is buil t largely on OpenStreetMap — but using OSM in a real product at this sca le quickly shows that the data is not always complete\, consistent\, or re ady to use as-is.\n\nIn this talk\, I will share what we have learned whil e running Mapy.com in production. Not an introduction to the product\, but practical experience: what works well\, what causes problems\, and what w e had to change or interpret to make the data usable for everyday outdoor navigation.\n\nA key part is understanding what a good outdoor map actuall y needs. For us\, that means things like a complete network of marked hiki ng and cycling routes\, usable terrain information\, and details that help people orient themselves in real conditions. When parts of this are missi ng or inconsistent\, the result can be routes that look fine on the map bu t don’t work well in reality. In practice\, the biggest challenge is oft en not incorrect data\, but missing connections and incomplete route netwo rks\, combined with strong regional differences in data quality.\n\nWe see this in practice — situations where navigation leads people into terrai n they are not prepared for are not rare\, and they show how important dat a quality really is.\n\nWe will also look at attributes like surface and d ifficulty\, access restrictions\, and seasonal limitations\, which are oft en critical for deciding whether a route is actually suitable. I will also touch on overtourism and how maps can better reflect real-world constrain ts instead of just showing everything that exists.\n\nFinally\, I will sha re how this experience feeds back into OpenStreetMap — what we contribut e\, where we still see gaps\, and where better cooperation between compani es and the community could help.\n\nThis talk is for anyone interested in how OpenStreetMap is actually used in practice\, especially beyond the “ it works on the map” level. DTSTAMP:20260817T030503Z LOCATION:Corse SUMMARY:When Maps Mislead: Lessons from Outdoor Navigation with OpenStreetM ap — Jakub Zmrzlik URL:https://pretalx.com/sotm2026/talk/VUYNMB/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-ec7588a7-3cb3-5f0f-a788-a631b4cf9079@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T154000 DTEND;TZID="+02:00":20260829T154500 DESCRIPTION:YouSpeed.de investigates how OpenStreetMap speed-limit tags\, a rea context\, and daily diffs can be transformed into an offline smartphon e runtime for intelligent speed assistance (ISA). The contribution is a re producible deployment study showing that a single-file spatial SQLite bund le gives the best measured latency/update trade-off\, while route-level re play shows that richer topology is not automatically better under mobile c onstraints. DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:OpenStreetMap for Intelligent Speed-Limit Assistance (ISA): The You Speed.de Study — Raphael Volz URL:https://pretalx.com/sotm2026-osm-science/talk/AQVAYA/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-ab54e01d-fc49-5f17-a8ea-32856cb19207@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T154500 DTEND;TZID="+02:00":20260829T155000 DESCRIPTION:OpenStreetMap data are used in travel demand modelling not only to derive transport networks\, but increasingly also to quantify the attr activeness of traffic analysis zones in destination choice modeling. Our p aper presents this domain-specific use case and examines which processing steps are particularly suitable for deriving robust attractiveness measure s from OSM data. We describe the processing workflow and discuss the usabi lity for modelling purposes. The developed workflow has been implemented i n code and is published on GitHub to support transparent and reproducible use. DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:OpenStreetMap for Travel Demand Modeling: An Open Approach to Deriv e Attractiveness for Destination Choice Models — Christian Klinkhardt\, gabrielwilkes URL:https://pretalx.com/sotm2026-osm-science/talk/EYA7UN/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-8effb7b3-0898-5a60-97d9-bb33b84c149b@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T155000 DTEND;TZID="+02:00":20260829T155500 DESCRIPTION:An introduction to the public transport stop analysis (PTSA) pr oject for visualizing public transport mapping habits around the world and a closer look at how to efficiently and accurately measure lots of distan ces between neighboring OSM objects. DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:Public transport stop analysis for OSM and Welzl's algorithm on the sphere — Jens Flemming URL:https://pretalx.com/sotm2026-osm-science/talk/LA3WRV/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-49242359-8965-59be-a385-04f331a1ed07@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T155500 DTEND;TZID="+02:00":20260829T160000 DESCRIPTION:This paper presents a scalable\, relation-aware framework for n ational-scale cycling network analysis by combining the ohsome platform an d DuckDB to process the complete Dutch cycling network from OpenStreetMap. It enables efficient\, reproducible evaluation of intrinsic data quality and infrastructure characteristics across hierarchical route relations\, s upporting consistent assessment of cycling network completeness\, connecti vity at national scale. DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:Assessing the Intrinsic Data Quality of OpenStreetMap for National- Scale Cycling Network Analysis — Vanessa Bolognani URL:https://pretalx.com/sotm2026-osm-science/talk/FPWSB8/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-3664a5e4-ce1a-5ee8-a3ac-c8e77068a616@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T160000 DTEND;TZID="+02:00":20260829T160500 DESCRIPTION:This study evaluates how well OpenStreetMap (OSM) data can expl ain urban operating speeds using spatial regression models in Curitiba\, B razil\, combining naturalistic driving data with socioeconomic and built-e nvironment variables. The results show that OSM-derived variables\, especi ally road network density and traffic signals\, are useful for identifying spatial patterns in speed\, but their limited detail reduces predictive a ccuracy\, making OSM more suitable for exploratory large-scale safety anal yses than precise modeling. DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:OpenStreetMap Data for Spatial Regression Modeling of Urban Operati ng Speed — Rafael Szeliga URL:https://pretalx.com/sotm2026-osm-science/talk/CAPXCT/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-0ae0a95d-2404-559c-9eba-b27967abb6bc@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T164500 DTEND;TZID="+02:00":20260829T170500 DESCRIPTION:Clearance is an open-source quality-control proxy for OpenStree tMap replication. Rather than letting every changeset flow directly into d ownstream systems\, it holds suspicious or potentially breaking changes fo r review while keeping compliant data flowing continuously. It acts as a s tandard OSM data source\, providing PBF extracts\, diffs and an Overpass A PI compatible endpoint of the filtered local copy. It is already used by o ver 40 organizations\, including emergency services in Navarre\, Spain\, a nd is under review by the French railway infrastructure company SNCF Rése au and Belgian crisis services.\nThis talk will cover the last year's impr ovements and the roadmap up to version 1.0\, including features funded by the NLnet/NGI0 project. It will focus on:\n • multi-object conflation \; \n • diff rearrangement to allow partial validation while keeping data coherence\; \n • change detection in network continuity to avoid breaks or false connections\, such as in road networks or power grids. DTSTAMP:20260817T030503Z LOCATION:Guadeloupe SUMMARY:Clearance: Quality Proxy for OSM Replication. The Roadmap up to v1. 0 — Frédéric Rodrigo URL:https://pretalx.com/sotm2026/talk/VGGXRJ/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-d27da7a7-8d71-534b-b070-b8c10f46dea2@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T164500 DTEND;TZID="+02:00":20260829T172500 DESCRIPTION:In this session the topic of OSM POI data and its usefulness fo r blind navigation users will be explored. Through examples ranging from h eight of buildings\, inscriptions of monuments and random facts dropped in editor's notes\, the participants will discover how complete POI data con tributes to a more accessible and inclusive world.\nAccessible mobile tool s and strategies allowing for access to POI data and navigation will be pr esented\, followed by a discussion of possible improvement scenarios for greater participation of the blindness community in the consumption and c reation of OSM data. Examples of such strategoes might include accessible mapping tools\, additional tags and mapping categories and inclusion into local OSM communities.\nParticipants will leave the talk equipped with kno wledge on how their work within the OSM community contributes to improved mobility for persons with disabilities. They will also gather ideas for re flection on the state of OSM data globally and strategies to make local co mmunities a place where new meaningful connections revolving around the co mmon goal of creating open data can be forged. DTSTAMP:20260817T030503Z LOCATION:La Réunion SUMMARY:Text with a purpose - building the image of the world for blind use rs through structured and complete POI data — Pawel Masarczyk URL:https://pretalx.com/sotm2026/talk/7Z7PZM/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-f5b1d4e4-b1ef-5871-99b1-17eed96df113@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T164500 DTEND;TZID="+02:00":20260829T170500 DESCRIPTION:In the wake of the French "Loi d'Orientation des Mobilités" (L OM)\, local authorities faced a major challenge: how to produce and share standardized\, high-quality data on cycling infrastructure? \nThis present ation explores the success story of the Base Nationale des Aménagements C yclables (BNAC)\, a national standard born from the collaboration between Geovelo\, Carto’Cité\, the French government and local authority\, and the OpenStreetMap community.\nFor over two decades\, Carto’Cité and Geo velo have been using OpenStreetMap as their core engine. When the need for a national database emerged\, instead of creating a closed silo\, the par tners chose to leverage OSM's flexibility. We will detail our methodology\ , aiming to replicate such a success :\n\n- Data Enrichment: How we transf orm raw OSM tags into a schema compliant with national requirements.\n- Th e Feedback Loop: How we help local authorities to contribute back to OSM\, ensuring a "single source of truth" that benefits everyone – from GPS u sers to urban planners.\n- Success Metrics: A look at the results with ove r 110\,000 km of cycling paths harmonized and available for everybody.\n\n This session will demonstrate how private players\, rooted in the communit y and the OSM environment\, can act as technical catalysts to turn OSM dat a into a government standard\, providing a replicable model for other cou ntries aiming for Cycling Data Sovereignty. DTSTAMP:20260817T030503Z LOCATION:Corse SUMMARY:How OpenStreetMap became the backbone of France's National Cycling Database — Samuel Deschamps-Berger URL:https://pretalx.com/sotm2026/talk/DTQXXN/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-25f2018d-d428-5124-8e24-ba4e9668ed91@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T164500 DTEND;TZID="+02:00":20260829T174500 DESCRIPTION:Many people turn to Wikipedia when looking for information abou t the OpenStreetMap ecosystem.\nSince Paris hosted Wikimania—Wikipedia ’s SOTM—in July\, this workshop will teach you how to contribute to Wi kipedia’s pages on OpenStreetMap and maps. Let’s bring our two communi ties closer together—they have so much in common and so much to learn fr om one another! DTSTAMP:20260817T030503Z LOCATION:Tahiti SUMMARY:Let's create links between OSM and Wikipedia! — Delphine Montagne URL:https://pretalx.com/sotm2026/talk/TUDVSJ/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-1ab86be1-17a6-500d-9eee-869cc88ecdcc@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T164500 DTEND;TZID="+02:00":20260829T172000 DESCRIPTION:This talk analyses how gender inequality shapes OpenStreetMap's (OSM) tagging proposal process\, revealing that diversity gaps intensify at higher participation levels. Maps are never neutral — their makers' d emographics determine whose realities are represented or silenced. Systema tically analysing every tagging proposals and votes since its creation usi ng a purpose-built R package\, we found that 59 prolific\, mostly European and North American male users dominate proposal approval\, while feminise d proposals are underrepresented and disproportionately opposed. These fin dings confirm that structural inequities persist regardless of how well-de signed\, flexible and well-intended technologies may be. DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:Whose Knowledge Counts? Analysing Diversity and Exclusion in OpenSt reetMap's Tagging Proposals Process — Carlos Cámara URL:https://pretalx.com/sotm2026-osm-science/talk/FLYV3H/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-c729351f-871e-55de-b539-168030070ad4@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T172000 DTEND;TZID="+02:00":20260829T174000 DESCRIPTION:‘Adopt Your Town’ is a workshop proposed for third-year hig h school pupils\, to be conducted during the 2025/26 school year. The prim ary target of this initiative is not only to improve OpenStreetMap. This e ducational project aims to promote a sense of unity and cohesion among pup ils and their local community.\n\nNovice users of OpenStreetMap have a dif ferent perspective and range of interests to more seasoned users. Conseque ntly\, the likelihood of acquiring new data increases. Eventually\, this w ork outlines how the OpenStreetMap environment’s tools can be used as Op en Educational Resources (OERs).\n\nThe aim of this workshop is\, firstly\ , to enhance participants’ cartography skills and\, secondly\, focusing on the local community\, to highlight aspects that are often overlooked by mainstream mapping services.\n\nMoreover\, pupils have created tactile ma ps of the school campus to assist blind individuals. This was easily and e fficiently done using the Touch Mapper tool.\n\nThe pupils were enthusiast ic about the prospect of creating a map of their own town. They were surpr ised to discover a database of cartographic information similar to Wikiped ia\, and they became even more engaged when they realised that they could map a wide variety of subjects\, such as trees\, benches\, and defibrillat ors. Furthermore\, the workshop shifts the focus from commercial-oriented mapping to a more people-centred approach.\n\nEach pupil has identified an area of interest and explored it. Some examined their immediate environme nt\, while others mapped all the beaches in the area\, and some even mappe d trees and street lamps. Furthermore\, some pupils have added house numbe rs\, which in Italy are located on every door and not on every building.\n \nThe project was made possible because\, in Italy\, all third-year high s chool pupils are required to do a practical project supervised by their te acher or tutor. DTSTAMP:20260817T030503Z LOCATION:Guadeloupe SUMMARY:Adopt Your Town — Giacomo Alessandroni URL:https://pretalx.com/sotm2026/talk/VPACJY/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-56727b5a-256f-5899-bd74-31085fb7349e@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T172000 DTEND;TZID="+02:00":20260829T172500 DESCRIPTION:In Nepal \, we have been developing a tool called OSMSG to trac k the user level mapping statistics to help us organize our events \, mapp ing activities and monitor \, In this talk we will talk about the tool we developed \, how we developed it ! This talk involves our architecture wit h duckdb \, postgresql \, API's and standalone python processor built on t op of osmium ! This tool doesn't do anything else rather than providing th e OSM mapping statistics in user level ! Similar to how leaderboard used t o work ! It would be our official public launch of the tool to wider OSM community ! DTSTAMP:20260817T030503Z LOCATION:Corse SUMMARY:OSMSG : OpenStreetMap User Group Hashtag Stats — Kshitij Raj Shar ma\, Gaurav Baral\, Niruta Neupane URL:https://pretalx.com/sotm2026/talk/HJLK8U/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-db840178-9bc7-59e1-bf7b-a2173efddcd7@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T172000 DTEND;TZID="+02:00":20260829T175500 DESCRIPTION:Large-scale scraping attacks on OpenStreetMap's infrastructure have exposed a fundamental tension between open geodata as a community-mai ntained commons and its role in current commercial AI development dynamics . This presentation examines the implications of AI-driven data extraction for OSM’s infrastructure and licence compliance guidelines as well as i ts consequences for OSM’s position within the geospatial data ecosystem. DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:Consumed at Scale: AI-Driven Extraction and the Political Economy o f OpenStreetMap — Hannah Boettcher URL:https://pretalx.com/sotm2026-osm-science/talk/MWCJFD/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-fd32ac02-1668-5674-b0de-75d515af9d14@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T172500 DTEND;TZID="+02:00":20260829T173000 DESCRIPTION:This talk will introduce Ultra\, an alternative high-performanc e front-end to overpass\, qlever\, sophox\, and more powered by MapLibre G L JS. It will cover the basics of how Ultra works: choosing a backend quer y service and authoring your query as well as how to style the query resul ts using MapLibre. DTSTAMP:20260817T030503Z LOCATION:Corse SUMMARY:Making maps with Ultra — Daniel Schep URL:https://pretalx.com/sotm2026/talk/ZRRUJU/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-a5ca23e3-f6cc-58e0-9ea7-7919b06b69fc@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T173000 DTEND;TZID="+02:00":20260829T173500 DESCRIPTION:OpenStreetMap is one of the most powerful open geospatial datas ets in the world\, yet for many who stand to benefit most from it\, it rem ains invisible. NGO workers planning humanitarian responses\, students con ducting research\, local planners building community infrastructure\, and developers looking to build location-aware applications often don't know w here to start\, which tools to use\, or how OSM can realistically achieve their goals for their work.\n\n[UseOSM](https://www.useosm.org/) is a comm unity-driven platform built to close that gap. It brings together tools\, real-world use cases\, and community stories in one accessible place\, pre sented in plain language that anyone can understand\, not just experienced mappers.\n\nThis talk will walk through the full vision and current state of [UseOSM](https://www.useosm.org/)\, covering:\n\n- Why [UseOSM](https: //www.useosm.org/) exists — the visibility and discovery gap that motiv ated the platform\, and why making OSM's impact legible to the wider world matters for data quality and community growth alike.\n\n- How anyone can get value from it — whether you're an NGO seeking the right tools for fi eld data collection\, a researcher looking for project inspiration\, or a developer hunting for OSM-powered software to build on or learn from.\n\n- How to contribute content: a walkthrough of the contribution guidelines f or adding use cases\, project spotlights\, statistics\, and stories that r eflect the true breadth of what OSM data powers.\n\n- How developers can c ontribute — a clear onboarding path for technical contributors who want to help build and improve the platform itself.\n\n- What comes next — th e repository maintenance workflow\, governance model\, and a preview of up coming features on the platform roadmap.\n\nThe core argument is simple: t he more people understand what OpenStreetMap makes possible\, the more mot ivated they become to use and to contribute well. Every navigation app\, e very humanitarian response tool\, every urban planning dataset quietly pow ered by OSM is a missed opportunity to inspire a new contributor or spark a new creative project. [UseOSM](https://www.useosm.org/) turns those quie t successes into visible\, shareable stories. DTSTAMP:20260817T030503Z LOCATION:Corse SUMMARY:UseOSM: Promoting OpenStreetMap Data Usage and Impact Through an Op en and Accessible Web Platform — Victor Ademoyero\, Emmanuel Jolaiya URL:https://pretalx.com/sotm2026/talk/GSZW7S/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-c4905d53-8872-57d8-b89b-76abcf36173d@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T175500 DTEND;TZID="+02:00":20260829T181500 DESCRIPTION:As OpenStreetMap becomes more mature and complete\, the challen ges now lie in ensuring data quality. Mappers may receive customised feedb ack on their contributions\, and data reusers are seeking greater confiden ce in the information they rely on.\n\nOver the past year\, we at [MapYour Grid](https://mapyourgrid.org/) have been working on assessing and improvi ng the quality of power infrastructure data in OpenStreetMap. This work re lies on existing quality assurance and monitoring tools\, such as [Osmose] (https://wiki.openstreetmap.org/wiki/Osmose) and [Podoma](https://wiki.ope nstreetmap.org/wiki/Podoma)\, with a quality comparison approach through a new platform\, [GridInspector](https://mapyourgrid.dynartio.com/gridinspe ctor.html).\n\nWith this talk\, we aim to share with the community how we built a coherent quality assurance strategy. We will present our experienc e combining multiple tools\, and show how automation can support continuou s monitoring and business-grade consistency testing.\nWe will also explore what comes next: moving towards a highly automated quality assessment pro cess for power infrastructure data. This includes leveraging Earth observa tion data and designing human-in-the-loop validation processes to balance automation with local knowledge and mapper expertise.\nWhile intended with power infrastructure data in mind\, the methods we present are designed t o be broadly used in many fields. Thus this presentation won’t be dedica ted to the power infrastructure topic but only use it as an example. In fa ct\, we would love to discuss with the community how these tools and metho ds can be replicated to other fields (i.e. assessing data quality for wate rways or road and urban infrastructures). \n\nAttendees will leave with practical insights on building a QA strategy\, leveraging existing tools m ore effectively\, and designing feedback loops that benefit both contribut ors and data reusers. DTSTAMP:20260817T030503Z LOCATION:Guadeloupe SUMMARY:The Power of quality in OpenStreetMap — François Lacombe\, Marin a Petkova\, Tobias Augspurger URL:https://pretalx.com/sotm2026/talk/BY7FZ7/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-46280a28-60bc-5006-955d-aacb77d35110@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T175500 DTEND;TZID="+02:00":20260829T181500 DESCRIPTION:Geocoders APIs are usually generalised to return results that a re good enough for most people. In this talk we want to talk about how to create a geocoder that is specialized for your use case and returns result s that are best for your users. The talk introduces the newest features of the Photon geocoder and shows how they can be used to easily set up a tru ly customized search engine. We'll explain along the way the basic princip les how a geocoder does its job and\nwhat kind of data it needs to do it. DTSTAMP:20260817T030503Z LOCATION:La Réunion SUMMARY:Search and find what you are looking for — Sarah Hoffmann URL:https://pretalx.com/sotm2026/talk/NHDJM3/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-a612256e-eafc-591d-a812-8a1c068435ef@2024.stateofthema p.org DTSTART;TZID="+02:00":20260829T175500 DTEND;TZID="+02:00":20260829T181500 DESCRIPTION:This talk presents an open-source stack for building\, renderin g\, and using OpenStreetMap vector tiles. [Ascend Maps](https://github.com /styluslabs/maps) is a cross-platform application for interactive maps. It is highly customizable\, with hiking\, cycling\, and transit views for th e base map\, user-editable sources\, styles\, and shaders for custom maps\ , and plugins for search\, routing\, and map sources.\n\n[tangram-ng](http s://github.com/styluslabs/tangram-ng) extends the Tangram ES map engine or iginally created by Mapzen\, adding support for 3D terrain\, embedded SVG\ , and additional raster formats\, along with substantial performance and s tability improvements.\n\n[geodesk-tiles](https://github.com/styluslabs/ge odesk-tiles) builds vector tiles on demand from a GeoDesk library\, making it possible to start serving tiles for the whole world instantly. geodes k-tiles also provides geocoding for worldwide place and POI search. DTSTAMP:20260817T030503Z LOCATION:Corse SUMMARY:A new stack for OpenStreetMap vector tiles — Matt White URL:https://pretalx.com/sotm2026/talk/9C7LJM/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-8886439d-2e9a-5788-82e3-3b8503ec854e@2024.stateofthema p.org DTSTART;TZID="+02:00":20260830T093000 DTEND;TZID="+02:00":20260830T095000 DESCRIPTION:Over the past year\, several Dutch governmental organizations c ollaborated to initiate Panorama\, a new open street‑level imagery effor t. This talk explains how the project was set up\, how data collection and processing were organized\, and how the resulting imagery strengthens pub lic digital autonomy. Similar to developments in France—where IGN has ta ken a leading role in producing sovereign geospatial data—Panorama aims to reduce dependency on commercial suppliers and ensure long‑term contro l over essential imagery. DTSTAMP:20260817T030503Z LOCATION:Guadeloupe SUMMARY:Panoramax Netherlands — Bas Bussink URL:https://pretalx.com/sotm2026/talk/JBF9HX/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-f122d73d-631a-5dc3-a05d-5b20e2aa851d@2024.stateofthema p.org DTSTART;TZID="+02:00":20260830T093000 DTEND;TZID="+02:00":20260830T095000 DESCRIPTION:The talk will present the web application *Where are my ways?*. It shows all deleted ways in their last visible version on the OpenStreet Map database. The talk will focus on the challenges raised by the OpenStre etMap data model and show how vandals can still evade such a tool. It will also present findings about the different types of deletions. DTSTAMP:20260817T030503Z LOCATION:La Réunion SUMMARY:Where are my ways? — Michael Reichert URL:https://pretalx.com/sotm2026/talk/NRPPPV/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-5400a721-5015-56ee-940b-cf618b0c26ea@2024.stateofthema p.org DTSTART;TZID="+02:00":20260830T093000 DTEND;TZID="+02:00":20260830T103000 DESCRIPTION:The OpenStreetMap Foundation owns the OpenStreetMap hardware an d trademarks. It uses money to keep the platform running.\n\nThe Foundatio n sees the positive impact of current paid work\, but has not yet to funds to sustain all that activity. In this workshop we ask the attendants as m embers of the OpenStreetMap community for advice how to raise the funds. DTSTAMP:20260817T030503Z LOCATION:Tahiti SUMMARY:Future of the OpenStreetMap Foundation — Roland Olbricht URL:https://pretalx.com/sotm2026/talk/EPRSWT/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-816224df-8a31-5597-a2b3-84a960284cfd@2024.stateofthema p.org DTSTART;TZID="+02:00":20260830T093000 DTEND;TZID="+02:00":20260830T100500 DESCRIPTION:This abstract examines how corporate editing affects OpenStreet Map’s collective intelligence. Using OSM data from 2015–2025 for sever al countries in Southeast Asia\, it operationalizes collective intelligenc e through measures of completeness\, semantic richness\, geometric complex ity\, diversity\, innovation\, and evenness\, combined into a composite sc ore. Descriptive country-level analysis and local-projection models for Th ailand and Malaysia show that corporate editing has real but bounded effec ts: it often improves innovation and completeness\, but some waves reduce decentralization. Effects fade within about two years\, suggesting OSM’s resilience. DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:Corporate Editing and Collective Intelligence in OpenStreetMap: A L ong-Term Analysis of Southeast Asian Case Studies — Yair Grinberger URL:https://pretalx.com/sotm2026-osm-science/talk/JC87RR/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-5855f5ce-bd80-5d51-a9db-37961e7dcd18@2024.stateofthema p.org DTSTART;TZID="+02:00":20260830T100500 DTEND;TZID="+02:00":20260830T102500 DESCRIPTION:As the Executive Director and Program Coordinator at OpenStreet Map US\, Maggie and Alyssa are lucky to say OpenStreetMap is their full-ti me job. OpenStreetMap US is both a local chapter of the OpenStreetMap Foun dation\, and an independent 501(c)(3) nonprofit organization in the United States. This presentation will explore how OpenStreetMap US has evolved t he organization’s approach to community building\, as communities of map pers emerge and dissolve across the United States.\n\nA few topics that wi ll be covered in this talk include:\n- OSM US membership structure\n- Evol ution of the Board of Directors\n- Hiring paid staff\n- Community engageme nt initiatives (surveys\, blog posts\, etc)\n\nWhether you are a leader of another OSMF Local Chapter or the only mapper in a 100 mile (sorry - kilo meter) radius\, you’re invited to explore what it means to build a mappi ng community with us. DTSTAMP:20260817T030503Z LOCATION:Guadeloupe SUMMARY:50 States (and at Least as Many Mappers): Community Building in the US Over the Last Decade — Alyssa Castronuovo\, Maggie Cawley URL:https://pretalx.com/sotm2026/talk/RYFJC7/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-2f6aa53f-9489-5727-a1db-3d9638b34a52@2024.stateofthema p.org DTSTART;TZID="+02:00":20260830T100500 DTEND;TZID="+02:00":20260830T102500 DESCRIPTION:CoMaps started in May 2025 as a fork of Organic Maps\, with the goal of providing digital maps and navigation tools that are 100% open so urce and transparently made by and for community. Since then\, the communi ty has shipped ~2 updated app versions per month. Among other things\, tho se have improved core features\, made the app more international\, expande d the integration with the OSM ecosystem and reduced the existence of sing le points of failures in the provisioning of the app. Here\, we share some of updates\, how CoMaps is governed and how you can get involved. DTSTAMP:20260817T030503Z LOCATION:La Réunion SUMMARY:CoMaps - How to make a community-based map & navigation app based o n OpenStreetMap — Bastian Greshake Tzovaras\, Diego Miguel Lozano URL:https://pretalx.com/sotm2026/talk/DDJRVU/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-bde12b82-5f17-5b0e-9df1-b24134ea8c37@2024.stateofthema p.org DTSTART;TZID="+02:00":20260830T100500 DTEND;TZID="+02:00":20260830T104000 DESCRIPTION:Geographical databases such as OpenStreetMap (OSM) are continuo usly evolving to reflect ground-level transformations. Identifying and cha racterizing these changes is a key challenge for analyzing evolution over time. While several works have analyzed OSM edit history\, the semantic in terpretation of changes and the ability to distinguish genuine ground-leve l evolution from data refinements\, tagging corrections\, or modeling deci sions\, remains largely unaddressed. For planners relying on OSM\, disting uishing real infrastructure changes from editing artifacts is critical. We address this challenge through two contributions: a web application to ex plore change dynamics and a methodology for semantic annotation and interp retation of edits. DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:Detection and Semantic Annotation of Changes in OpenStreetMap Data — Camille Bernard\, PedroPinheiro URL:https://pretalx.com/sotm2026-osm-science/talk/3PBPMG/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-32d8f6b4-9036-5b9d-a3bf-25826af839b8@2024.stateofthema p.org DTSTART;TZID="+02:00":20260830T111500 DTEND;TZID="+02:00":20260830T113500 DESCRIPTION:The availability of road network data at scale in OSM has fuele d a solid ecosystem of open-source projects dedicated to route planning: O SRM\, Openrouteservice\, Valhalla\, GraphHopper\, Jsprit\, Vroom to just n ame a few.\nThis talk aims at providing an overview of the main routing an d route optimization engines that are both open-source and self-hostable: digging into their respective features as well as differences and the impl ementation trade-offs that make them more suitable for certain use-cases. DTSTAMP:20260817T030503Z LOCATION:Guadeloupe SUMMARY:Moving around with OpenStreetMap — Julien Coupey URL:https://pretalx.com/sotm2026/talk/WXZR7C/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-498a7423-8ecd-5592-98fa-0b46213fe6ae@2024.stateofthema p.org DTSTART;TZID="+02:00":20260830T111500 DTEND;TZID="+02:00":20260830T113500 DESCRIPTION:Lightning talks are short presentations (maximum 5 minutes) abo ut a topic related to OpenStreetMap. DTSTAMP:20260817T030503Z LOCATION:La Réunion SUMMARY:Lightning Talks III — SotM Working Group URL:https://pretalx.com/sotm2026/talk/XDLP7V/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-979ee9a0-968d-5909-a665-831ab088542d@2024.stateofthema p.org DTSTART;TZID="+02:00":20260830T111500 DTEND;TZID="+02:00":20260830T121500 DESCRIPTION:Centipede-RTK is a free and collaborative network for sharing o pen GNSS RTK data. This network enables you to obtain centimeter accuracy geolocation. Initiated in France in 2019\, the project quickly spreads ove r Europe and the entire World.\nOpenStreetMap (and Panoramax) contributors can take this opportunity to create more accurate\, more detailed data.\n \nDuring this workshop\, you will use an RTK receiver (provided) by pairin g it with your Android smartphone (not provided). You will install an « N TRIP client » app and set it up to access the Centipede-RTK caster. The N TRIP client will then supply the geolocation to your favorite mapping app. A short walk outside will enable you to check and appreciate the accuracy achieved.\n\nThe workshop will be held in french and english\, by Stépha ne PÉNEAU (developer of RTKBase software\, which powers most of the Centi pede-RTK bases) and his colleagues from Carto’Cité.\n\nPrerequisite : y ou must have an Android phone on which you can install an "NTRIP client" a pp\, such as Bluetooth GNSS. DTSTAMP:20260817T030503Z LOCATION:Tahiti SUMMARY:Experience centimeter accuracy surveying with the open network Cent ipede-RTK — Stéphane Péneau URL:https://pretalx.com/sotm2026/talk/NPZRV9/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-0e1b77fd-b20a-5965-8d39-699a5de8ef6f@2024.stateofthema p.org DTSTART;TZID="+02:00":20260830T111500 DTEND;TZID="+02:00":20260830T125500 DESCRIPTION:You are invited for a StreetComplete walk! We will map nearby a rea using StreetComplete. Please\, bring a phone with StreetComplete insta lled on it.\n\nBoth people familiar with StreetComplete and completely unf amiliar with it are welcome!\n\nWe will check what can be still mapped and what can be improved in StreetComplete.\n\nMeeting at conference check-in desk. DTSTAMP:20260817T030503Z LOCATION:Outdoor Workshops SUMMARY:StreetComplete walk — Mateusz Konieczny URL:https://pretalx.com/sotm2026/talk/NJNJKN/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-f610225e-30cc-5757-9fe1-4ea79e92ec8d@2024.stateofthema p.org DTSTART;TZID="+02:00":20260830T111500 DTEND;TZID="+02:00":20260830T115000 DESCRIPTION:This study introduces a novel intrinsic completeness metric for OpenStreetMap data\, based on the temporal evolution of mean feature geom etry\, requiring only aggregate feature statistics and no external referen ce. The results currently depict an exploratory phase and show the method to be robust\, computationally simple and potentially universally applicab le\, albeit still restrictive. DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:Assessing Data Completeness in OpenStreetMap using the Geometrical and Temporal Properties of Mapping Patterns — Eliya Levin URL:https://pretalx.com/sotm2026-osm-science/talk/KYSVEE/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-448a54fc-a317-5110-9a76-efffdd5c62b5@2024.stateofthema p.org DTSTART;TZID="+02:00":20260830T115000 DTEND;TZID="+02:00":20260830T121000 DESCRIPTION:Processing such large datasets as OSM is a tricky business. In this talk I would love to tell a story about a set of optimisations and tr icks that allowed to reduce graph building time for [Valhalla routing engi ne](https://github.com/valhalla/valhalla) from 22h to 7h. It's a story abo ut C++\, OSM and geospatial data and how obvious things can lie unnoticed without a proper tooling - or how to measure performance on such scale and find what to fix. DTSTAMP:20260817T030503Z LOCATION:Guadeloupe SUMMARY:Making world spinning faster - How we sped up Valhalla graph creati on in 3 times — Stefan Kizim URL:https://pretalx.com/sotm2026/talk/C3LEQ9/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-e53ac97f-1a23-57b8-b58e-500f7b89acc3@2024.stateofthema p.org DTSTART;TZID="+02:00":20260830T115000 DTEND;TZID="+02:00":20260830T121000 DESCRIPTION:The UN Maps Programme\, an initiative from the Department of Op erational Support at the United Nations\, provides topographic maps\, oper ational geo-information\, search and navigation tools\, and imagery and st reet-level base maps to peacekeeping and humanitarian actors in UN mission areas. UN Maps has established a community of OpenStreetMap (OSM) data co ntributors called UN Mappers. The UN Mappers community is a collective of open mapping enthusiasts dedicated to building accurate\, crowdsourced geo spatial data to support peacekeeping and humanitarian missions on the grou nd.\nThe session will provide updates about the UN Maps programme and the UN Mappers community\, focusing on our co-created pilot initiative that ai ms to build sustainable and community-owned geospatial data and capacity b uilding for OSM/open data contributors\, the UN Maps Ambassadors and Chapt ers. We hope to discuss lessons learned\, challenges\, and opportunities f or collaboration to further this initiative. DTSTAMP:20260817T030503Z LOCATION:La Réunion SUMMARY:UN Mappers: Building Local Capacities and Communities to Support Pe ace with OpenStreetMap — Laura Mugeha\, Diego Gonzalez Ferreiro URL:https://pretalx.com/sotm2026/talk/FJYCMJ/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-8fd2010a-6cc0-5759-87d0-8be042065455@2024.stateofthema p.org DTSTART;TZID="+02:00":20260830T115000 DTEND;TZID="+02:00":20260830T122500 DESCRIPTION:This study evaluates OpenStreetMap's reliability for global min ing mapping\, revealing significant data gaps and classification errors co mpared to scientific benchmarks. It highlights the need for refined filter ing methods and better contributor practices to overcome these geographic and semantic biases. DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:Global Mining Activity in OpenStreetMap: Methodological Challenges and Data Quality Analysis — Pierre-Olivier Mazagol URL:https://pretalx.com/sotm2026-osm-science/talk/7HWF8H/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-afc8fb00-3ff7-5ff0-915f-e25c982c6b9c@2024.stateofthema p.org DTSTART;TZID="+02:00":20260830T122500 DTEND;TZID="+02:00":20260830T123000 DESCRIPTION:Transport models routinely anchor points of interest (POIs) at the centroid of their building or parcel. On large multi-building sites\, this can misrepresent pedestrian access\, distorting first-/last-mile tran sit access\, wheelchair routing\, and curbside drop-off precision. We quan tify how explicit `entrance=*` detail in OSM shifts accessibility-style me trics relative to centroid proxies. The study uses a global\, population/b uilt-volume-weighted random sample to compare centroids against the neares t main entrance. We release the full toolchain that persists measurements between POI / entrance / centroid anchors and the nearest road network and transit stop. DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:From centroid to entrance: a global assessment of POI access locati ons for accessibility — Pierre-Leo Bourbonnais\, Yannick Brosseau URL:https://pretalx.com/sotm2026-osm-science/talk/EL3XUW/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-f074ed02-9f28-5e94-9dbb-01bcd1d0ba1c@2024.stateofthema p.org DTSTART;TZID="+02:00":20260830T123000 DTEND;TZID="+02:00":20260830T123500 DESCRIPTION:This study analyzes OpenStreetMap contributions in Ukraine sinc e the February 2022 invasion\, crossing OSM building edits with ACLED conf lict events and frontline geometries. Results reveal a sharp spike in edit s following the invasion\, concentrated around Kyiv\, alongside a moderate correlation between bombardment events and mapping activity. Spatial anal ysis shows contributions near the frontline even in occupied areas\, sugge sting deletions and ruin tags as proxies for physical destruction. DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:OSM contribution analysis in war time — Amine Chebil\, Raphaël B res\, Malek Rihani URL:https://pretalx.com/sotm2026-osm-science/talk/NTXXN8/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-ef0c1fe6-1f16-5d52-852b-d2cfcdc9da0b@2024.stateofthema p.org DTSTART;TZID="+02:00":20260830T123500 DTEND;TZID="+02:00":20260830T125500 DESCRIPTION:Temporary closures of paths and roads are common in real-world environments\, particularly in hiking regions and protected landscapes. Ho wever\, representing these changes in OpenStreetMap remains challenging. W hile OSM provides tagging mechanisms such as access restrictions and condi tional tags\, their use for temporary closures is inconsistent\, and their interpretation by routing engines and map applications varies widely.\n\n This talk presents the results of a thesis investigating how temporary clo sures can be effectively handled within the OSM ecosystem. It introduces a structured approach for modelling different types of closures using exist ing OSM tags and defines practical decision rules for their application. T he talk further examines how these tagging strategies are interpreted by r outing engines and demonstrates their impact on routing results under diff erent scenarios.\n\nIn addition\, the talk presents a prototype workflow f or integrating closure information into a dynamically updated mapping serv ice and discusses visualization strategies for communicating closures clea rly.\n\nThe results provide practical recommendations for improving the re presentation of temporary closures in OSM and highlight current limitation s in handling time-dependent data. DTSTAMP:20260817T030503Z LOCATION:Guadeloupe SUMMARY:Handling Temporary Closures in OpenStreetMap — Matteo URL:https://pretalx.com/sotm2026/talk/RU3UY3/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-8d6a7130-526d-5484-be45-44974d2a7ea5@2024.stateofthema p.org DTSTART;TZID="+02:00":20260830T123500 DTEND;TZID="+02:00":20260830T125500 DESCRIPTION:The ohsome framework makes OSM data analysis\, data quality ass essment and data download simple - for community members\, researchers and developers. SOTM 2026 marks a fundamental milestone for us as we want to **introduce ohsome-planet** and **release ohsome API v2.0**. During this t alk you can get insights about design decisions\, new features\, common us e cases and the road map ahead. DTSTAMP:20260817T030503Z LOCATION:La Réunion SUMMARY:Milan to Paris via Dundee: ohsome 2.0 has arrived! — Benjamin Her fort URL:https://pretalx.com/sotm2026/talk/S9MD3B/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-179a961c-edf1-5b76-91ae-a4a49f2c6d42@2024.stateofthema p.org DTSTART;TZID="+02:00":20260830T123500 DTEND;TZID="+02:00":20260830T124000 DESCRIPTION:Many "way" elements in OSM are tagged "railway." OpenRailwayMap builds upon them\, adding numerous details. However\, the lack of "relati on"\, between "ways" no longer used as railways\, hinders the analysis of abandoned lines. Knowledge from the realm of Volunteer Geographic Informat ion can bring the missing link\, while leveraging the accuracy of OSM data . This article aims to add nodes of thousands forgotten stations\, and to fill hundreds gaps between scattered OSM elements\, which are unaware of t heir former railway line affiliation. The experiment covers almost entire old railway networks of France and Belgium. DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:Revealing past railway networks from OSM data — Robert Jeansoulin \, Philippe Gambette URL:https://pretalx.com/sotm2026-osm-science/talk/YNRWXR/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-e5284cb2-0a0d-577b-be7c-f15ab2911f41@2024.stateofthema p.org DTSTART;TZID="+02:00":20260830T124000 DTEND;TZID="+02:00":20260830T124500 DESCRIPTION:The StreetMeasure framework addresses the critical lack of road dimension (width=*\, lanes=*) in OpenStreetMap. Applied to SP6 provincial road (Piacenza\, Italy)\, by utilizing DA360 for monocular depth estimati on and SAM 2 for segmentation\, it reconstructs 3D point clouds from dista nt crowdsourced street-level imagery\, which was difficult for traditional photogrammetry. Then it aligns generated depth data with high-resolution satellite transects to recover scale. This open-source pipeline enriches OSM tags\, supports provincial infrastructure management\, and enables imm ersive urban planning simulations. DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:StreetMeasure - A low cost open source framework using monocular de pth estimation supporting OSM measurement tags from 360 streetview photos\ , the case of SP6 — Quang Huy NGUYEN\, Federica Gaspari URL:https://pretalx.com/sotm2026-osm-science/talk/LKLQFT/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-9740f2f9-869b-5a68-a9fd-c54cd479c3c0@2024.stateofthema p.org DTSTART;TZID="+02:00":20260830T124500 DTEND;TZID="+02:00":20260830T125000 DESCRIPTION:Terraink is an open-source web application that turns OpenStree tMap data into printable city map posters without requiring installation\, programming\, or GIS expertise. I analyze its first 60 days as a mixed-me thods natural experiment to examine whether lowering technical barriers re veals latent demand for OSM-derived outputs beyond expert user communities . DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:Terraink: Lowering Barriers to OpenStreetMap Data Consumption - A U sage Study of an Open-Source Web Application — Yousif Amanuel URL:https://pretalx.com/sotm2026-osm-science/talk/UNTDRT/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-39aa11a7-2715-5a55-931f-6433f48d1d18@2024.stateofthema p.org DTSTART;TZID="+02:00":20260830T143000 DTEND;TZID="+02:00":20260830T153000 DESCRIPTION:Join the OSMF Board for our Ask Us Anything session. The sessio n will start with a short update presentation from the Board\, and then we will switch to an open discussion with the community. Questions can come from the room or from community submissions gathered ahead of the event\, on recent work\, current priorities\, and future plans.\nIf you're not sur e what the Board actually does\, this is the session to come to. Find out what the Foundation does and doesn't do\, what it can and can't do\, and h ow you can get involved. The Board is committed to openness and to engagin g with the community: not just here\, but year-round. Ask us here\, ask us in the hallway\, ask us online. DTSTAMP:20260817T030503Z LOCATION:Guadeloupe SUMMARY:OSMF Board AMA — Laura Mugeha\, Héctor Ochoa Ortiz URL:https://pretalx.com/sotm2026/talk/LPJ9S7/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-cf3ffe9a-00d6-5b6e-b988-a688b5545a27@2024.stateofthema p.org DTSTART;TZID="+02:00":20260830T143000 DTEND;TZID="+02:00":20260830T145000 DESCRIPTION:This talk provides an overview of tagging practices for mapping LGBTQ+ venues and spaces in OSM\, covering history of mapping. We'll talk about what sort of things can\, and can't be tagged\, what should\, and s hould not\, be mapped.\n\nThe aim is to offer a structured summary of curr ent practices while outlining key limitations\, supporting more informed a nd responsible contributions to OpenStreetMap. DTSTAMP:20260817T030503Z LOCATION:La Réunion SUMMARY:Here be Rainbows: LGBTQ mapping in OSM — Amanda McCann\, Erica 's pughetti' Temp URL:https://pretalx.com/sotm2026/talk/MRSUBA/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-b6727911-070a-5d60-b6b8-1c5d1e57014f@2024.stateofthema p.org DTSTART;TZID="+02:00":20260830T143000 DTEND;TZID="+02:00":20260830T145000 DESCRIPTION:Lightning talks are short presentations (maximum 5 minutes) abo ut a topic related to OpenStreetMap. DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:Lightning Talks IV — SotM Working Group URL:https://pretalx.com/sotm2026/talk/DWSETV/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-196cdcbe-3925-5380-a6cc-9c5f05be8467@2024.stateofthema p.org DTSTART;TZID="+02:00":20260830T143000 DTEND;TZID="+02:00":20260830T153000 DESCRIPTION:There are already existing many JOSM paint styles for different usecases. But didn't you always felt like hm yes this is very useful but I would prefer if it shows in red instead of green because in my area this is not visible enough. Or you working with a special niche data that have n't been covered by another paint style yet. Why not make your own? Let's explore the openness of JOSM and use it for our benefit. DTSTAMP:20260817T030503Z LOCATION:Tahiti SUMMARY:Let's create your own JOSM paint style! — Patrik Brigant URL:https://pretalx.com/sotm2026/talk/G9GXNA/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-148d2fa5-1bf0-5503-99ca-3d00486d67ef@2024.stateofthema p.org DTSTART;TZID="+02:00":20260830T150500 DTEND;TZID="+02:00":20260830T152500 DESCRIPTION:OpenStreetMap contributions in Ghana and Africa continue to gro w rapidly but one big question is how is this growth transforming and impa cting the project's future. In this talk I share how decisions by both ind ividual and organized mapping activities continue to create massive useles s data in OpenStreetMap that nobody is ever going to use and how we can pr event more of such future occurrences. DTSTAMP:20260817T030503Z LOCATION:La Réunion SUMMARY:1000 ways to kill OpenStreetMap in Ghana and elsewhere in Africa — Enock Seth Nyamador URL:https://pretalx.com/sotm2026/talk/RY8MQP/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-01edb0ba-e044-5afe-b1da-c1e309145c5b@2024.stateofthema p.org DTSTART;TZID="+02:00":20260830T150500 DTEND;TZID="+02:00":20260830T152500 DESCRIPTION:Lightning talks are short presentations (maximum 5 minutes) abo ut a topic related to OpenStreetMap. DTSTAMP:20260817T030503Z LOCATION:Martinique SUMMARY:Lightning Talks V — SotM Working Group URL:https://pretalx.com/sotm2026/talk/WYKG8T/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-d190f611-972a-573e-87fb-36e66a3dd4ed@2024.stateofthema p.org DTSTART;TZID="+02:00":20260830T154000 DTEND;TZID="+02:00":20260830T160000 DESCRIPTION:A quick tour of interesting places and anecdotes to explore on OpenStreetMap around the world🌍: because it’s beautiful\, surprising\ , and delightfully crazy. Anything that makes you say\, “Wooow!🫨 How? ”🤔 or... “Why?🙃”\, because that's definitely the kind of thing that leads people to OpenStreetMap! :)\nLet's explore the (OSM) world! 🤩 DTSTAMP:20260817T030503Z LOCATION:Guadeloupe SUMMARY:Wonders of OSM — CapitaineMoustache URL:https://pretalx.com/sotm2026/talk/VUTQVY/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-dfcdc6f3-5075-5f8d-9c2f-a78a137216f5@2024.stateofthema p.org DTSTART;TZID="+02:00":20260830T154000 DTEND;TZID="+02:00":20260830T160000 DESCRIPTION:In mountain regions\, OpenStreetMap quality problems rarely loo k dramatic from aerial imagery\, but on the ground they matter: disconnect ed trails at crossings\, inconsistent trail classification\, missing surfa ce/track details\, and unclear junctions can make a “complete-looking” map fail real navigation. This talk presents a smartphone‑only field wo rkflow I applied during a mapping trip in Manang\, Nepal: collecting GPX t racks on foot and street‑level imagery (Mapillary)\, then converting tha t evidence into targeted\, human‑reviewed OSM improvements.\n\nI will sh are a repeatable method designed for areas where teams do not have access to specialist equipment (no UAV\, no LiDAR). The workflow is structured as capture → annotate → edit → validate → measure. To keep the appro ach scalable\, I will also demonstrate “AI-assisted QA” that helps tri age my own field evidence (e.g.\, flagging likely trail junction issues or missing attributes for later manual review)\, while keeping all edits com munity‑aligned and mapper‑verified.\n\nI will show before/after map ex cerpts from Manang\, a small set of impact metrics (coverage\, connectivit y fixes\, tagging completeness)\, and practical lessons about privacy\, sa fety\, and transparency so others can replicate the approach in the Himala yas and other high‑relief regions. DTSTAMP:20260817T030503Z LOCATION:La Réunion SUMMARY:Mountains Break Maps: Smartphone Ground Truth + AI QA for Himalayan Trails in OSM — Niruta Neupane\, Pragya Joshi URL:https://pretalx.com/sotm2026/talk/LE3NKZ/ END:VEVENT BEGIN:VEVENT UID:pretalx-sotm2024-24333e9c-5380-5e14-871f-a459defc56bd@2024.stateofthema p.org DTSTART;TZID="+02:00":20260830T164500 DTEND;TZID="+02:00":20260830T170500 DESCRIPTION:We say goodbye to this year’s State of the Map conference and to Paris. You will see some impressions from the conference and we say th ank you to all volunteers and to the local team in Paris. We hope that we can already announce the venue of State of the Map 2027. DTSTAMP:20260817T030503Z LOCATION:Guadeloupe SUMMARY:Closing — SotM Working Group URL:https://pretalx.com/sotm2026/talk/RHY7NP/ END:VEVENT END:VCALENDAR