Projections and GeoFormatTypes about geomakie.jl

[visr]

It's worth noting that Proj.jl now depends on and accepts GeoFormatTypes since JuliaGeo/Proj.jl#74.

[visr]

I think most of the projection code here can be removed once JuliaGeo/Proj.jl#51 lands. Would Proj4.jl not also be the place to add GeoFormatTypes.jl support, like was done in ArchGDAL? Would be nice if only a PROJ dependency would be sufficient for most of these conversions. Although GDAL supports a few more formats still I believe.

[rafaqz]

Probably is! I just saw all the crs types defined here too. But better to support it at a lower level.

Currently ArchGDAL does belessed type-piracy on convert to allow e.g converting EPSG to WellKnownText. We may need a Plots.jl-like backend system to allow using both.

[asinghvi17]

Converting to GFT.ProjString should work here, would be a simple enough change. Will look into that after the larger refactor is complete :D

[asinghvi17]

#207 begins the path to adding this integration, as I recall.

[asinghvi17]

It should currently support EPSG, Proj-string, Proj-JSON, and WKT natively. I do still need to add tests though :D