Plotting on the sphere, Collection of issues

[asinghvi17]

• Using Geodesy transforms already works
• Can we make a wrapper type for a cartesian/ECEF dest crs, which is guaranteed to elevate all points to 3D?
• What plot types don't naturally work in this scenario?

One thing to note is that we'll need to refine meshes for polygons in order to have them actually look spherical. Maybe we can do this via DelaunayTriangulation though, and compute barycentric coordinates for shading / texturing on real meshes.

Band on globe with meshimage and surface

Contourf and contour on globe!!

[asinghvi17]

Rasters also work with surface and a Proj transform func, but the rest of the recipes don't. We need to figure that out.

[asinghvi17]

Maybe we have a Known2DTo3DTransform{T} wrapper that encodes a transformation and default / baseline z value...