WIP: Geo format type wrappers and generic methods

[rafaqz]

No tests yet, but things like reproject do work for any format types, which is pretty powerful allready.

I'm not really familiar with the details of these formats or GDAL methods, so input on how to actually test these things and finish the PR will be needed.

My intent (and knowledge) is more around generalising the structure of these package and the ecosystem so we can do all kinds of transformations without needing all the method permutations everywhere.

For GeoData.jl this PR allows us to do GDALarray(filepath; reproject=EPSGcode(4326)) where you can pass in anything for reproject and GeoData doesn't need to know what it is, but your lat/lon coords will just work.

The type wrappers are coming from https://github.com/rafaqz/GeoFormatTypes.jl

[yeesian]

I'm not really familiar with the details of these formats or GDAL methods, so input on how to actually test these things and finish the PR will be needed.

To my knowledge, the spatial projection tests that we have are defined in the following files:

• https://github.com/yeesian/ArchGDAL.jl/blob/master/test/test_cookbook_projection.jl, and
• scattered in comments in https://github.com/yeesian/ArchGDAL.jl/blob/master/test/test_ospy_examples.jl

[rafaqz]

Ok this is is tested, it just has to wait for the new version of GeoFormatTypes to go into the registry for tests to pass.

convert converts geometries or crs between most types in GeoFormatTypes. The mode::Geom and mode::CRS traits are used to handle multi-use formats like WellKnownText or GML. They will mostly be picked automatically in GeoFormatTypes.

reproject accepts any crs formats to generate the transform, and any GeoFormatTypes or AbstractGeometry geometry to be transformed. It also accepts tuple/vector coord formats (that could be cleaned up and standardised to fit GeoInterface etc at some point).

I'll rebase it against the other pull request once that's in, but otherwise this is done, so comments would be useful.

[rafaqz]

This is rebased and passing now.

[yeesian]

Thanks for this PR!

It seems to involve changes not just to the projections, but also to the Geometries right now, so I'll like to have a second pass at it after the requested changes.

[rafaqz]

Ok I think this is pretty much finished, sorry for the delay! I've been using it for a few months in GeoData.jl and it's working well.

[yeesian]

It looks great, thanks a lot! :)

[rafaqz]

Thanks! I can relegister GeoData.jl whenever this is registered.

[visr]

@rafaqz it will be registered in a few minutes: JuliaRegistries/General#12666