Make reproject safer across CRS

[asinghvi17]

Apparently it can error if your point is completely outside the valid area. Should we make it return:

• All points NaN
• An empty geometry
• A better error
• Something else
  ?

cc @alex-s-gardner who brought this up on Slack

[alex-s-gardner]

@asinghvi17 what are you defining as a valid area? Is it just anywhere where the algorithm doesn't error?

It would be nice if reproject had a clip_src option... and maybe a clip2validdomain = true/false

[asinghvi17]

Yeah that would be nice...the problem is, that we don't actually have access to valid bounds :D

https://github.com/MakieOrg/GeoMakie.jl/blob/e897be2d7227e9b935efc0657276004f51fcd138/src/projection.jl#L37-L46 is what I use to handle this in GeoMakie, it could be useful here - but it does add a bit of time to the algorithm.

[alex-s-gardner]

What about returning an error along the lines of "some points fall outside of valid projection domain, try supplying a valid extent to clipsrc"

[rafaqz]

If we just error by default but we let users pass an argument to get slower but correct/NaN results?