[AstroPy] General method to compute pixel solid angle for any WCS projection?
Christoph.Deil at mpi-hd.mpg.de
Thu Dec 5 09:07:10 EST 2013
does anyone know a good general method to compute pixel solid angles for arbitrary WCS FITS maps?
I know there is HEALPIX and for some WCS projections there are analytical formulae for pixel area, but I was wondering if there is a standard robust method to implement it for any WCS.
I did find methods to compute the area of polygons on the sphere:
Would representing each pixel as a 4-corner polygon (or subdividing the pixel sides into parts if the pixels are large and precision is needed) and using that method be the best option?
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