ISO 19170-1:2021

This document supports the definition of:
-  A Discrete Global Grid Systems (DGGS) core comprising:
-  an RS using zonal identifiers with structured geometry, and
-  functions providing import, export and topological query,
-  Common spatio-temporal classes for geometry, topology, RS using zonal identifiers, zonal identifiers and zones, based on ISO 19111 CRS. The spatio-temporal scope is constrained to:
-  spatial elements that are invariant through all time, and
-  temporal elements that are invariant across all space.
-  Equal-Area Earth Reference Systems (EAERSs) for Equal-Area Earth DGGS.