On Sun, Sep 14, 2008 at 9:58 AM, Hamish <hamish_b at yahoo.com> wrote: ... > "What do PROJ4's +a, +lon_0, and +k terms mean? Which convention are > the 7-term towgs84 terms given in?" would be valid subjects of PROJ4 > documentation. It could go into PROJ4 trac which is also a Wiki: http://trac.osgeo.org/proj/wiki/GenParms Markus