The GeoZarr Solution

Standards building is hard, but we are in this together The GeoZarr Challenge Solution 1 2 3 4 Important news about GeoZarr Takeaways Background History of GeoZarr standard development Zarr Summit + Conventions Get involved Gaining and maintaining momentum from the Zarr summit Help build and try out Zarr Conventions Zarr conventions provide simple, composable pillars for GeoZarr (goal: 2025) The GeoZarr spec will be the OGC standard for these conventions (goal: mid-2026) *Note that the GeoZarr spec is not YET OGC approved, this is the goal for 2026 1 2 3 4 Most important facts about GeoZarr today Takeaways Background History GeoZarr standard development Zarr Summit + Conventions Get involved Gaining and maintaining momentum from the Zarr summit Help build and try out Zarr Conventions Metadata conventions are essential for interoperability and preservation The community has been building GeoZarr since 2023, based on an ESA-sponsored draft 2015-2021 2022 2023 2024 2025 December 2015: Zarr community project January 2022: GeoZarr draft proposed for ESA funded cloud native database January 2023: NASA picks up the topic, Informal GeoZarr meetings start, repo moved to zarr developers GitHub June 2022: Zarr 2.0 adopted as OGC Community Standard November 2023: GeoZarr becomes an official OGC SWG chaired by Brianna and Christophe February 2024: GeoZarr sprint held in NY, overviews and interoperability table work begins April 2025: Critical PRs submitted providing more complete initial specification mapping with conformance classes Metadata conventions are hard to build Metadata conventions are hard to build well Proj, spatial, and multiscales conventions will be released this month (Dec. 2025) *Type-safe implementations in EOPF-Explorer project provide confidence in releases dggs convention also under active development *Implementation driven development via xdggs 1 2 3 4 Most important facts about GeoZarr today Takeaways Background History GeoZarr standard development Zarr Summit + Conventions Get involved Gaining and maintaining momentum from the Zarr summit Help build and try out Zarr Conventions Convention Framework Spatial Convention Proj Convention Multiscales Convention Join Zarr Conventions co-working sessions to become an early adopter *You can also ask questions on the GitHub discussions or Zarr Zulip Join the GeoZarr SWG to track OGC standardization process