I'm trying to map a list of 2-vectors in an [N,2] PDL from spherical coordinates to an Aitoff projection. Scaling by 180/pi does not seem to help. (Also, what are the limits of the two axes? 0-360, or -180-180? Does it matter?)
David Whysong On Mon, Feb 2, 2009 at 12:28 PM, Craig DeForest <[email protected]> wrote: > I think that the documentation for PDL::Transform::Cartography wrongly > implies > that the rho,phi coordinates should be in radians. They should be in > degrees. > > > For example, if you have PGPLOT installed, try: > > use PDL::Transform::Cartography; > $w=pgwin(xw,size=>[12,5],nx=>2); > $e = earth_image(); > $w->fits_imag($e); > $w->fits_imag($e->map(t_aitoff,[500,500])); > > That will show you the Earth image in both Plate Caree coordinates (in > degrees) > and Aitoff transformed coordinates (in radians). > > Cheers, > Craig _______________________________________________ Perldl mailing list [email protected] http://mailman.jach.hawaii.edu/mailman/listinfo/perldl
