SciTools/iris — pull request #763 by bjlittle (2013-09-17 11:25:09+00:00)
Title: Default CF spherical earth radius.

This PR performs some PyKE convenience function rationalisation for building NetCDF loader coordinate systems.

Common code for determining the underlying grid mapping ellipsoid has been re-factored into a single function, which also additionally checks for the CF ```earth_radius``` grid mapping attribute, which defines a spherical earth.