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03/09/2026-09/09/2026
[1] ediyes, who has not only been an active member of the Spanish weeklyOSM team for years, but is also a successful mapper | © HOT Macro Mapaton Regional |
Mapping
- Voting has started on the
lgbtq=*proposal and is open until and including 19 September.
Mapping campaigns
- In a talk at State of the Map 2026, Enock Seth Nyamador explained how massive mapathon campaigns carried out by paid mappers affiliated with large companies or organisations could potentially ‘kill’ the OpenStreetMap movement in Ghana.
Community
- [1] The editors at weeklyOSM don’t just collect and write articles to keep you as well informed as possible about the OSM universe; they also map
, some with such great success. We would like to offer our warmest congratulations to @ediyes, from our Spanish team, on this achievement! With her Peruvian team , Edith came second , behind the Guatemalan team . - rphyrin explained the situation around Jakarta following the recent Anak Krakatau eruption, while showing how OpenStreetMap data is being used in an early warning system to alert people about the areas expected to be affected by volcanic ash. Anak Krakatau, meaning ‘child of Krakatau’, is an active volcano in the Sunda Strait between Java and Sumatra that emerged from the caldera left by the catastrophic 1883 Krakatau eruption, which killed an estimated 35,000 people.
, some with such great success. We would like to offer our warmest congratulations to Local chapter news
- Katja Haferkorn reported ► that the FOSSGIS e.V. networking meeting took place on 2 September, with 25 participants joining the online networking platform. The next networking meeting will be held on 9 December 2026.
►
Events
- Are you a Stadia Maps customer? They just announced that they’re sponsoring local meet-ups to align with their core values of providing fair, transparent treatment for developers.
- Christoph Hormann shared a general commentary on the State of the Map 2026 conference in Paris, which he had recently attended.
- State of the Map Asia 2026 was held in Osaka, Japan, on 6 and 7 September.
OSM research
- Maurizio Napolitano wrote ► about ‘Stress in bici’, an experimental map based on OpenStreetMap that shows bicycle routes in Italy, colour-coded according to stress level. The development of the platform is also described in a research paper, ‘TS-BikePlan: A Data-Driven Tool for Enhancing Cycling Infrastructure and Safety’, published in the Journal of Urban Technology .
- Giuliano Cornacchia et al. have studied the recommended routes given by software navigation services and found out that as adoption increases, route diversity declines. Further, traffic and emissions converge onto fewer roads leading to lesser benefits (which eventually turn negative over a certain threshold) in terms of CO₂ emissions and traffic load. For the purposes of this study, the road networks were sourced from OpenStreetMap.
- The OSM Road Monitor team presented their work at SotM 2026 in Paris. By combining community-driven mapping with independent Earth observation data, the project aims to support more reliable and timely road information.
►Maps
- Continuing the discussion around the recent UN shift from the Mercator to the Equal Earth projection, the OpenStreetMap community on Reddit has started discussing whether OSM should make the switch as well. Meanwhile, back in 2025, also prompted by a discussion about OSM map projections, Andy Townsend had already shown us that anyone can render OSM data in whatever projection they want.
- Mathias has published a map, ‘Polizeikarte’ , which brings together public press releases from German police authorities. It shows around 63,600 incidents from 260 locations across 14 federal states. Geocoding is handled by Nominatim, whilst the visualisation is provided by MapLibre GL JS using tiles from OpenFreeMap. Official reference layers can be overlaid, such as the accident atlas from the statistical offices, which contains 585,815 accidents from 2018 to 2025. The project is non-commercial and is not affiliated with any public authority.
Open Data
- Iconem has recently updated terrain-viewer, an app made to ingest, style, and render open-data terrain-sources for relief visualisation, feature detection, and mapping! They’re using it to detect archaeological sites, and there is some overlap with mapping landmarks within OSM from terrain sources, whether public worldwide like Mapterhorn, or national, since the tool can ingest custom national mapping agencies data sources.
Software
- Stadia Maps explained the distinction between forward geocoding and reverse geocoding and how choosing the right endpoint and parameters can make a big difference for any application.
- Strongly motivated by the urge to avoid getting a speeding ticket, Moonshot Studios GmbH have developed YouSpeed, a mobile intelligent speed-assistance app powered by OpenStreetMap speed-limit tags, area context, and daily diffs. Other apps of Moonshot Studios include Woladen (where to charge your electric car) and Tankzeit (best time to fuel up your car).
- rphyrin has made ‘ivebeen_here’, a platform for OSM users to share their personal stories about particular places.
Programming
- Agasta08 published the full report for their 2026 Google Summer of Code project, ‘Category Support in Nominatim’, thanking mentors Sarah Hoffmann and Marc Tobias, as well as OpenCage for sponsoring the development server used for the planet-scale database setup. Agasta explained how the category model has been implemented in Nominatim.
- Inspired by a discussion at the recent State of the Map, rphyrin tried out ‘Photon‘, an open-source geocoder built for OpenStreetMap data, and built a custom front end that allows users to copy the coordinates of search results.
Releases
- OsmAnd released version 5.4 for iOS with a redesigned My Places interface, a rebuilt Plan a Route tool, and a new Astronomy plugin. The Android release came with a refreshed Search UI, the ability to attach media to Favorites, and 3D Buildings with roof shapes.
- Altilunium LocationPad v26.9.5 has been released – a web app for marking, labeling, and revisiting places on an OpenStreetMap-based map.
- Sourtest v26.9.6 has been released.
- The August 2026 release of Organic Maps has been released, introducing several new features, including multi-selection for bookmarks and tracks, a CarPlay dashboard, the ability to hide tracks on the map, and more readable share links.
Did you know that …
- … the recent ChatGPT update can now show OpenStreetMap-based map data based on your chat query, complete with proper OpenStreetMap attribution?
OSM in the media
- Brian Bergstrom has launched Dulcet GIS, a podcast about cartography and civic mapping. The first episode covers the UN General Assembly’s adoption of the Equal Earth projection and sets it alongside the executive order renaming Lake Ontario, noting that OpenStreetMap was the only major map that did not change the name. The episode explained the on the ground rule and how disputed names are handled in the data model, and closed by pointing listeners to OSM-based apps and to the Humanitarian OpenStreetMap Team.
- The latest event of the Ingolstadt Citizens’ Network was held ► on Sunday 6 September, focusing on the theme ‘Navigation using OpenStreetMap data’. The event demonstrated how OpenStreetMap can be used in everyday life, which apps are based on it, and how people can contribute to improving the maps themselves. The event was free and open to everyone, with no prior knowledge required.
Other “geo” things
- The United Nations General Assembly has voted by an overwhelming majority in favour of adopting a world map based on the 2018 Equal Earth projection, which more accurately reflects the actual size of countries and continents, moving away from the Mercator projection. In New York, 164 states voted in favour of the resolution, which was sponsored by Togo and backed by the African Union. The United States was the only country to vote against ► it, describing the initiative as an ‘ideological agenda’. Six countries abstained.
- Scientists, led by space physicist Endawoke Yizengaw of The Aerospace Corporation in the US, have discovered that the solar flares of 11 November 2025 caused widespread, coast-to-coast disturbances in the atmosphere across the continental US. The disturbances could potentially throw GNSS positioning off by more than 10 metres in some places, the researchers say, significant enough to disrupt precision agriculture and autonomous vehicles.
- After announcing that Lake Ontario would continue to be called that on their maps, the MapQuest app went to number one for navigation on the iOS App Store in the US.
- Maggie Downs, of the BBC, visited Vienna’s Globe Museum, the only public museum in the world dedicated entirely to globes.
- Oliver Bünte, of Heise, reported that the US Department of Defense’s Defense Innovation Unit has tested a quantum sensor-based flight navigation system over the Pacific that allows an aircraft’s position to be determined precisely without relying on GNSS. Instead of relying on signals from navigation satellites, the system detects changes in the Earth’s natural magnetic field and creates a magnetic field map from these measurements. Based on this map, the system can determine an aircraft’s position entirely independently of GNSS signals, weather, and visibility conditions.
Upcoming Events
| Country | Where | Venue | What | When |
|---|---|---|---|---|
| 🇩🇰 | København | Cafe Bevar’s | OSMmapperCPH  | 2026-09-13 |
| 🇬🇧 | Greater London | 1 Cabot Square, 7th Floor, Canary Wharf E14 4QJ | EAW Volunteering Event | 2026-09-14 |
| CartONG : Mapathons en ligne 2026-2027 | 2026-09-14 | |||
| 🇪🇸 | Madrid | Online | Mappy Hour OSM España | 2026-09-15 |
| Missing Maps London Mid-Month for Advanced Mappers (no training provided) (Online) [eng] | 2026-09-15 | |||
| 🇺🇸 | San Francisco | Near BART 24th St. Mission station | Bay Area WikiSalon | 2026-09-15 |
| 🇫🇷 | Lyon | Tubà | Réunion du groupe local de Lyon | 2026-09-15 |
| 🇩🇪 | Bonn | Dotty’s | 204. OSM-Stammtisch Bonn | 2026-09-15 |
| 🇩🇪 | Chemnitz | Kaffeesatz, Chemnitz | OSM-Stammtisch Chemnitz | 2026-09-15 |
| 🇦🇹 | Stainach-Pürgg | Online | 22. Österreichischer OSM-Stammtisch (online) | 2026-09-15 |
| 🇺🇸 | San Jose | Online | South Bay Map Night | 2026-09-15 |
| 🇩🇪 | Online | Lüneburger Mappertreffen (online) | 2026-09-15 | |
| 🇨🇭 | St. Gallen | Rosenbergstrasse 59, 9000 St.Gallen | Map The Climate! Ein Mapathon | 2026-09-16 |
| 🇫🇷 | MJC de vienne | Réunion du groupe local de Vienne | 2026-09-16 | |
| 🇩🇪 | Köln | Lokal K, Hackländer Straße 2, Köln-Ehrenfeld | OSM Stammtisch Köln | 2026-09-16 |
| 🇫🇷 | Nantes | COntrib’atelier | 2026-09-16 | |
| 🇺🇸 | San Francisco | Et al. | A Synesthete’s Atlas: Cartographic Improvisations Between Eric Theise, Gusty Winds May Exist, Ron Heglin, and Petra Zélie | 2026-09-16 |
| 🇩🇪 | Karlsruhe | Schwarzer Kater | Stammtisch Karlsruhe | 2026-09-16 |
| 🇩🇪 | Kiel | Kieler Innovations- und Technologiezentrum | OSM auf der Kielux 2026 | 2026-09-18 — 2026-09-19 |
| OSMF Engineering Working Group meeting | 2026-09-18 | |||
| 🇮🇹 | Catania | Centro Atena, via Fimia 34, 95128 Catania (CT) | Modifichiamo Wiki e OSM insieme! — Catania | 2026-09-18 |
| 🇮🇳 | Mumbai | Lokhandwala Garden, Andheri | OSM Mumbai Mapping Party No.14 (Andheri) | 2026-09-19 |
| 🇮🇳 | Delhi | Too Mikkii Tapas, South Extension | OSM Delhi Mapping Party No.31 (South Extension) | 2026-09-20 |
| 🇪🇸 | Madrid | Online | Mappy Hour OSM España | 2026-09-22 |
| 🇬🇧 | Derby | The Brunswick, Railway Terrace, Derby | East Midlands pub meet-up | 2026-09-22 |
| 🇩🇪 | Berlin | Online | OSM-Verkehrswende #79 | 2026-09-22 |
| 🇮🇹 | Catania | Piazza Roma, Catania (Punto di incontro) | Mappiamo le piste ciclabili — Catania | 2026-09-22 |
| 🇫🇷 | Nantes | Le Wagon Nantes | OpenStreetMap, la carte à la carte ! | 2026-09-23 |
| 🇩🇪 | Hannover | Kuriosum | Stammtisch | 2026-09-23 |
| 🇩🇪 | Würzburg | FabLab Würzburg | Würzburger OSM-Treffen | 2026-09-23 |
| 🇬🇧 | City of Westminster | Blue Posts pub | London pub meet-up | 2026-09-23 |
| Pravidelný Missing Maps CZ-SK online Mapathon | 2026-09-24 | |||
| 🇧🇷 | 100% online | 🇧🇷 Lançamento de livros sobre mapeamento colaborativo | 2026-09-24 | |
| 🇩🇪 | Freiburg im Breisgau | CCCFR, Adlerstr. 12 a, Freiburg/Br. | OSM-Treffen Freiburg/Br. | 2026-09-24 |
| 🇮🇳 | Bengaluru | NIMHANS Convention Center | OSM India @ IndiaFOSS 2026 | 2026-09-25 — 2026-09-27 |
| UN Mappers Mappy Hour | 2026-09-25 | |||
| 🇲🇽 | Torreón | Universidad Tecnológica de Torreón | Conferencia «OpenStreetMap: Datos abiertos y más» | 2026-09-25 |
| 🇲🇽 | Torreón | Universidad Tecnológica de Torreón | Taller «Mapeando mi entorno» | 2026-09-25 |
| 🇩🇪 | Düsseldorf | Online bei https://meet.jit.si/OSM-DUS-2026 | Düsseldorfer OpenStreetMap-Treffen (online) | 2026-09-25 |
| 🇩🇪 | Karlsruhe | Geofabrik, Amalienstraße 44, 76133 Karlsruhe | Karlsruhe Hack Weekend September 2026 | 2026-09-26 — 2026-09-27 |
| 🇫🇷 | Nantes | Le Wagon Nantes | OpenStreetMap, la balade de la data | 2026-09-26 |
| Sudan Solidarity Series | 2026-09-26 | |||
| 🇸🇪 | Uppsala | Datorföreningen Update | Mapping meetup in Uppsala | 2026-09-27 |
| CartONG : Mapathons en ligne 2026-2027 | 2026-09-28 |
Note:
If you like to see your event here, please put it into the OSM calendar. Only data which is there, will appear in weeklyOSM.
This weeklyOSM was produced by MarcoR, MatthiasMatthias, Rob Yoegel, Strubbl, Andrew Davidson, barefootstache, derFred, tkk.
We welcome link suggestions for the next issue via this form and look forward to your contributions.