Consider include a Well Know Text description of the CRS about 2d-tile-matrix-set

[joanma747]

Now the wkt element of the CRS object is a PROJJSON object in the JSON encoding.

[joanma747]

This issue is related to opengeospatial/ogcapi-features#333

[joanma747]

In addition to that epoch, or any other information (The rotation coordinates?) or specific realizations, to deal with the CRS. (@jerome). Lets work with the CRS group for guidance.

[joanma747]

for the WKT it will be easy to have a string than having to rely on a "non-OGC" specification.

[joanma747]

Review the UML encoding and make that JSON uses PROJJSON and XML uses WKT.

For the JSON encoding we will use JSON schema for the JSON encoding and WKT for the XML.

https://proj.org/schemas/v0.2/projjson.schema.json

PROJJSON is a JSON encoding of WKT2:2019 / ISO-19162:2019, which itself implements the model of OGC Topic 2: Referencing by coordinates. Apart from the difference of encodings, the semantics is intended to be exactly the same as WKT2:2019.

https://proj.org/specifications/projjson.html