proj4js *crs registration* workaround

[mdsumner]

proj4js does not ship with proj.db and so uses workarounds for "common" codes like "EPSG:3031" by registering them. This obviously does not scale well to the available COGs out there. One way to work around this is to get the required OGCWKT text from spatialreference and register it on the fly https://spatialreference.org/ref/{auth}/{code}/ogcwkt/: https://gist.github.com/mdsumner/fb8373927fe026cd8bf6bf6700179040

Hacky workaround for 9354 specifically (this would be a never-ending task):

https://gist.github.com/mdsumner/a2115df9dd7c3aac3c353f1e784a725c#projection-string-bug

[mdsumner]

this is mentioned here proj4js/proj4js#491 (comment)

another possiblity is the new embedding of proj.db in 9.6 which should flow into proj4js and help everybody afaics https://proj.org/en/stable/install.html#cmdoption-arg-EMBED_RESOURCE_FILES

[kylebarron]

CRS registration isn't required by this library. We do and should continue to expose generic functions for converting GeoTIFF geokeys to a proj4js converter. But it's up to the user whether that happens by fetching spatialreference.org or what.

[mdsumner]

Ok thanks, I'm not at all used to where and how these facilities get exposed or are needed. Appreciate the opportunity to bumble in and learn 🙏