Great to see coordinate reference systems (CRS) supported again in GeoJSON. I recommend removing the options to provide CRSes through URIs. I was on the TIFF standards team and the main mistake we made was providing too many options making the specification too complicated for organizations to properly support. This was especially true when trying to read all the possible formats for parameters. I recommend just having simple parameters like "EPSG:3857". I've been doing this work for over 40 years and URIs are simply not reliable in the long term.
Great to see coordinate reference systems (CRS) supported again in GeoJSON. I recommend removing the options to provide CRSes through URIs. I was on the TIFF standards team and the main mistake we made was providing too many options making the specification too complicated for organizations to properly support. This was especially true when trying to read all the possible formats for parameters. I recommend just having simple parameters like "EPSG:3857". I've been doing this work for over 40 years and URIs are simply not reliable in the long term.