PROJ has rich support for defining an ellipsoid in a proj string. RG only supports the builtins or definitions via ellps=a,rf syntax. This PR adds support for reworking a and rf parameters in a proj string to ellps=a,rf. This support is added to parse_proj as it felt like the cleanest approach.
I opted for ignoring ALL other cases as they seemed more difficult to fix. I've added some documentation to parse_proj to indicate to users what they can expect.
I've also tacked on a small tidyup to proj strings whereby a scaling k parameter gets converted to k_0.
PROJ has rich support for defining an ellipsoid in a proj string. RG only supports the builtins or definitions via
ellps=a,rfsyntax. This PR adds support for reworkingaandrfparameters in a proj string toellps=a,rf. This support is added toparse_projas it felt like the cleanest approach.I opted for ignoring ALL other cases as they seemed more difficult to fix. I've added some documentation to
parse_projto indicate to users what they can expect.I've also tacked on a small tidyup to proj strings whereby a scaling
kparameter gets converted tok_0.closes #61