On Sat, Sep 17, 2011 at 8:43 PM, Bryce L Nordgren <bnordgren at gmail.com> wrote: > I wrote another page giving the math (with steps) for how to get size > and rotation (well for now just size) given the affine transform > coefficients. D'oh. http://trac.osgeo.org/postgis/wiki/DevWikiRealParameters