Return the GeoTIFF EPSG code for a CRS identifier, accepting EPSG URI/URN aliases, or null when the CRS cannot be written as a GeoKey (custom WKT or codes from 32767).
Return the GeoTIFF EPSG code for a CRS identifier, accepting EPSG URI/URN aliases, or null when the CRS cannot be written as a GeoKey (custom WKT or codes from 32767).