It appears that lookup table WCS cannot be created with astropy.wcs at present.

http://astropy.readthedocs.org/en/latest/api/astropy.wcs.Tabprm.html#astropy.wcs.Tabprm says a Tabprm table cannot be directly instantiated.

This is a feature request or a request for documentation if the functionality already exists. I'll help with implementation, but I need some direction. Does anything need to be modified in the C wrapper? Or is it just the python frontend that needs to be made?

Does astropy.wcs presently know how to write a tabular WCS, or do we need to implement that too?