A CRS object with a link to CRS parameters on the Web.
must be a dereferenceable URI.
must be a string that hints at the format
used to represent CRS parameters at the provided URI.
Suggested values are: "proj4", "ogcwkt", "esriwkt", others can be used:
Attempt to read href as URL and read its contents
Attempt to resolve to CRS object.
Attempt to resolve to CRS object. Will cause network request for LinkedCRS