SciTools/cartopy — pull request #277 by pp-mo (2013-05-23 13:59:49+00:00)
Title: Wrap transform methods of Robinson projection to avoid passing NaNs.

Attempts to workaround https://github.com/SciTools/cartopy/issues/232

Notes:
* found that "transform_points" (plural!) has the same problem
* scanned CRS methods for any more that might be affected (+ didn't find any)
* I have not looked "under the hood", so don't know whether this is really in PROJ4 or only the Python wrapper.

It would probably be a useful follow-on for someone to identify the actual source of the problem and push back on the relevant project. You might also want to require that as part of this work.