astropy/astropy — pull request #1281 by lpsinger (2013-07-23 23:53:21+00:00)
Title: Add iterative wcs.all_world2pix

Iterative inverse of wcs.all_pix2world. Closes #1066.

I also have a unit test in the works using some of the PTF example files that are already in `astropy/astropy/wcs/tests/data`, but my tests rely on #299/#1278.