Spec · 2025
Location Protocol
The Location Protocol specifies cryptographically verifiable location records -- coordinates, extents, and proofs -- that independent systems can produce and consume interoperably.
Purpose
Signed location records are only useful across systems if independent implementations agree on their shape.
Approach
An open specification for cryptographically verifiable location records -- coordinates, extents, and proofs -- aligned with existing geospatial standards and consumable across web and decentralized platforms.
Status
Live spec, maintained by the Decentralized Geospatial Collaborative.
Connections
Related Notes
Astral API
PreviewThe Astral API indexes location attestations from the Ethereum Attestation Service across chains and serves them through OGC-compliant REST and GraphQL interfaces backed by PostGIS.
Astral Compute
PreviewAstral Compute evaluates spatial predicates -- distance, containment, intersection -- inside a trusted execution environment and returns cryptographically signed results that a third party can verify.
Astral Docs: Location Proofs
ActiveThe Astral documentation describes location proofs as verifiable artifacts pairing a claim about the timing and position of an event with corroborating evidence, graded along a certainty spectrum rather than treated as absolute.
Astral Docs: Location Records
ActiveThe Astral documentation describes location records -- signed, verifiable location data artifacts that add cryptographic attribution and integrity checking to raw geospatial data.
Astral: a spatial extension for the decentralized web
ActiveThis FOSS4G North America 2025 talk introduces Astral: the Location Protocol for signed spatial records, a modular library of location-proof strategies, and Spatial.sol utilities for smart contracts.