State of the Map is the annual event for all mappers and OpenStreetMap users. The 2026 edition takes place from 28 to 30 August in Paris, France (Cité Descartes, Champs-sur-Marne) and online, with three days of talks, workshops and discussion rounds. It brings together the global OpenStreetMap community to share tools, research and experiences around open mapping. HeiGIT will contribute a beginner-friendly workshop on OSM analytics with the ohsome-dashboard, as well as a talk introducing ohsome-planet and the release of ohsome API v2.0.
Workshop: Introduction to OSM Analytics with ohsome
Presenters: Michael Auer, Rafael Troilo
This 60-minute beginner workshop offers an accessible entry point into OpenStreetMap analytics. No programming skills or prior experience required.
After a guided tour of the brand-new version of the ohsome-dashboard interface, participants learn to define spatial and thematic queries, interact with visualizations, and interpret analytical results. The core of the session is a hands-on exercise in which attendees build their own ohsome-filters, using the OSM-Wiki and Taginfo as reference tools. Along the way, participants gain insight into how OSM data is modelled, both in theory and in practice. Participants then apply their filters to regions of their own choosing to explore questions such as: How complete is a given attribute in an area? How current is the data? How has mapping activity developed over time?
The workshop closes with an outlook on more advanced analyses, exploration and user statistics for understanding contribution patterns and community dynamics.
By the end, participants will be able to formulate their own analytical questions, build suitable ohsome-filters, and interpret the results independently.
Talk: Milan to Paris via Dundee: ohsome 2.0 has arrived!
Presenter: Benjamin Herfort
The ohsome framework makes OSM data analysis, quality assessment and data download simple for community members, researchers and developers. SOTM 2026 marks a milestone for us: the introduction of ohsome-planet and the release of ohsome API v2.0. Working with OSM data at global scale poses three main challenges. Raw OSM data does not come in a GIS-ready format. The database has grown far beyond what a consumer laptop can handle, with the planet history file now at roughly 150 GB. And the data is scattered, with element, history and changeset information coming from different sources.
ohsome-planet addresses the first challenge by transforming raw OSM data into GeoParquet, a format widely adopted in the GIS-tech domain. It handles the heavy processing of building geometries, including complex multipolygon relations, and lets you join element and changeset information without losing any detail or metadata. It works with the full planet file as well as country extracts. The ohsome API addresses the other two. You can filter by tags, travel in time and tailor analyses to a custom area of interest, with all processing happening server side at HeiGIT. Major performance improvements mean that complex queries, such as the proportion of German roads carrying a name tag, now run in seconds. Version 2.0 adds filtering by changeset information, including hashtags.
The talk covers design decisions, new features, common use cases and the road map ahead, and demonstrates ohsome API v2.0 through country-level data quality reports examining completeness, currentness and attribute completeness. Existing ohsome API users will likely need to adapt their scripts to the new structure. We plan to organise a self-organised session during the conference to help with the transition, and we look forward to feedback from the community.