Allow on the fly raster reprojection

[jailln]

It would be a nice feature to allow on the fly raster reprojection like in OpenLayers: https://openlayers.org/en/latest/examples/reprojection.html to combine raster sources in different CRS.

Some information on how it is done in OpenLayers can be found here: https://github.com/openlayers/openlayers/blob/main/doc/tutorials/raster-reprojection.md

I believe it could easily be done once it will possible to display rasters in the same CRS with different TMS #1652 (which requires to modify the TMS concept in iTowns to make it a true tilematrixset and to use the projective texture mapping technique as started on this branch).

[gchoqueux]

Thank you, it's a very interesting article. It is indeed a good way to project the rasters on the globe. We will keep this in mind for the development of these next features