V1 Roadmap

The SWG approved a V1 roadmap at the February 2026 meeting. The target is OAB review by summer 2026.

GeoZarr V1 is built on three modular, composable Zarr conventions:

Convention	Repo
geo-proj (proj:)	zarr-conventions/geo-proj
spatial (spatial:)	zarr-conventions/spatial
multiscales	zarr-conventions/multiscales

Milestone 1: Release Candidate

All content complete and ready for formal review. No new features after this point.

Exit Criteria:

• All three conventions finalized
• Conformance classes defined
• Normative language (RFC 2119) applied throughout
• JSON Schemas stable and validated
• At least 3 implementations documented (Candidate maturity)
• Code owner designated for each convention
• Test dataset suite available
• Documentation complete (quickstart, composition guide, compatibility matrix)

Milestone 2: Architecture Board Review

Target: Summer 2026

Submit to OGC Architecture Board for technical review and public comment.

Exit Criteria:

• Spec document in OGC format
• Public comment period completed (30–60 days)
• Comments addressed

Milestone 3: SWG Vote

Final SWG vote for adoption as OGC Standard.

Exit Criteria:

• OAB review complete
• SWG vote passed
• Release artifacts published
• All conventions at Candidate maturity (3+ implementations)

Post-V1

Deferred to future releases:

• Linked datasets convention (multi-variable relationships, heterogeneous coordinates)

Progress Tracking

(1) V1 Release Candidate

May 2026

0 of 8 completed

• ○Define minimum requirements for qualifying a GeoZarr datasetspec
• ○Consistent versioning strategy for GeoZarr conventionsspecgovernance
• ○Advance conventions from Proposal to Candidate maturitymultiscalesgeo-projspatialgovernance
• ○Document tool compatibility matrixdocsiterop
• ○Create quickstart guidedocs
• ○Convention composition guidemultiscalesgeo-projspatialdocs
• ○Document reference implementationdocs
• ○Create conformance test dataset suitetesting

(2) OGC Architecture Board Review

Jun 2026

0 of 4 completed

• ○Create formal OGC Standard documentspec
• ○Define conformance classes structurespec
• ○Add normative language to specificationsspecmultiscalesgeo-projspatial
• ○OGC Architecture Board Review and Public Commentgovernance

(3) SWG Vote on V1

Sep 2026

0 of 2 completed

• ○SWG Vote for Standard Adoptiongovernance
• ○CF Convention Alignmentspeciterop

(4) Post V1

Sep 2026

0 of 2 completed

• ○Linked datasets conventionspec
• ○Chunking best practices guidedocs

View the full GitHub Project Board for details.