Innocent Maholi, from OpenMap Development Tanzania, published a tribute to his friend, Iddy Rashid Chazua, remembering his impact and the legacy he leaves.
Raquel Dezidério Souto wrote, in her OSM User Diary, about the second meeting of the 2026 OpenStreetMap Workshop Series. The meeting took place on Friday 22 May and covered the generation of aerial imagery from drone photos on OpenDroneMap; uploading images to OpenAerialMap; mapping with custom images in OSM editors; and creating relationships, with an emphasis on multipolygons. The event provided certificates to those who completed the tasks, and registration remains open for the remaining sessions.
Simon Ertel has launched Drevesa, an interactive map that transforms Ljubljana’s ‘Trees of the Year’ into a gamified urban trail. The project invites people to find and visit each winning specimen elected by citizens since 2019. By visiting these remarkable trees in real life, users can unlock information about tree species and learn the basics of arboriculture.
Franjo Lukežić shared the first in a set of heuristics that they use while field surveying, with the first one regarding how to survey highways.
Is editing config files very scary for you? If not, Mateusz Konieczny encourages you to help with the iD tagging schema.
Bastian Greshake Tzovarasreflected on the technical and socio-technical challenges of giving a workshop about OSM and open source map tools.
ScarlettB has published a summary of the problem and a proposal regarding the inconsistent mapping of the greenery in Bratislava’s sidlisko (Slovakia).
OpenStreetMap Foundation
Héctor Ochoa-Ortiz attended the 2026 Geospatial World Forum 2026 as a representative of the OpenStreetMap Foundation.
Local chapter news
Katja Haferkorn reported►that FOSSGIS e.V. participated in the 74th German Cartography Congress 2026, with an exhibition booth and a keynote presentation.
Events
Tickets for the SotM (28 to 30 August 2026) in Paris are now available.
Information on accommodation options around the venue can be found on a uMap (by Magnus Sälgö). In the SotM telegram channel, Sheldon also suggested finding possible accommodation options via bewelcome.org and couchers.org.
OSM research
Héctor Ochoa-Ortiz and others have concluded that the current micro-tasking model employed by the HOT Tasking Manager hampers the development of spatial collective intelligence, producing fragmented and inconsistent outputs that ultimately diminish overall data quality. In their study, the researchers proposed several practical measures to mitigate these issues, including the use of overlapping task boundaries and mechanisms to encourage implicit coordination among contributors.
Maps
The Civic Control platform has publisheda map of cultural heritage sites in Dnipro (Ukraine). This resource contains information on architectural monuments and newly identified cultural heritage objects, including addresses, protection status, registration documents, ownership information, and photographs. The project aims to improve transparency in the field of cultural heritage protection and facilitate public access to relevant data.
HuggeK has developedgolftiles, an open-source project to generate golf-centric PMTiles for mapping applications that want to highlight golf course maps.
Open Data
Foursquare has open-sourced the Foursquare OS Places dataset, a global database of more than 100 million points-of-interest data, under the Apache License Version 2.0. They have invited public participation through its Placemaker Tools platform, which allows users to contribute to and improve the OS Places dataset.
Software
Ian Wagner wrote, on Stadia Maps’ blog, about how Valhalla and OpenStreetMap are used to build routing profiles that encode each vehicle’s physical and legal constraints from the ground up.
Tina and Eugene explained how OsmAnd turns 3D building tags from OpenStreetMap data into rendered buildings displayed within the application.
didier2020 has written a new analyser for Osmose, which detects potentially duplicated POIs on OpenStreetMap. The source is available on GitHub.
Releases
We have the latest summary of changes to the OSM website. Apart from the latest features and fixes, there’s also notice of an upcoming change that will affect how GPX traces are stored and published. Feedback is welcome!
… the Kyiv Data Portal provides public accessto dozens of open datasets, APIs, maps, and dashboards published by Kyiv city authorities? This platform currently hosts 87 datasets covering topics such as transport, cycling infrastructure, air quality, civil protection, public participation, and municipal services.
^[1]^ … OnRouteMap is an OpenStreetMap-based tool for planning and analysing outdoor routes? Recently features such as POI filters, GPX/KML export of favourites, and new language support have been added.
Other “geo” things
Tohu Bohu Games and Quentin Vijoux presented the game ‘Beware of the Cartographer’. Players map a remote area, draw a border between two kingdoms during the Age of Enlightenment, and have to balance their surveying mission with local interests and political consequences.
Foursquare explained how it addressed the micro-location challenge, noting that places located inside buildings are often difficult to pinpoint accurately because different data sources frequently provide conflicting coordinates. Conventional geocoding methods typically return broad building-level locations, a level of precision considered inadequate for many modern applications, prompting Foursquare to develop its ‘Geosummarization’ model to improve geolocation accuracy at a more granular level.
Itamaraty (Ministry of Foreign Affairs of Brazil) will host the hybrid event ‘Itamaraty Map Library: History, Cartographic Collections, and New Perspectives’ on Tuesday 9 June, with an online stream. There is a registrationform, and participation is open to the public. The programme marks the launch of the new ‘General Catalogue of the Itamaraty Map Library’, which brings togethermore than 30,000 records, including maps, atlases, geographical charts, and rare documents, as well as the presentation of iconic historical pieces from the collection.
Upcoming Events
Country
Where
Venue
What
When
Missing Maps : Mapathon en ligne - CartONG [fr] :osmcalpic:
2026-06-08
Grenoble
La Turbine
Atelier de juin 2026 du groupe local OpenStreetMap de Grenoble :osmcalpic:
