Am 09.02.2014 00:42, schrieb Even Rouault:
But Antti guess seems right. Instead of +ellps=WGS84 (or +datum=WGS84), if you
play with the a (semi-major axis) and b (semi-minor axis) parameters, you can
see that only +a has an influence, so latest proj version seems to use a
spherical version of eqc.
If you look at
<http://trac.osgeo.org/proj/browser/trunk/proj/src/PJ_eqc.c>
and the chapter 12 of Snyders manual, you will only find formulas for
the sphere. So I guess there is no other way to calculate eqc.
Maybe older versions calculated another radius for the sphere when an
ellipsoid was given.
Greetings,
André Joost
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