Pix2Sky_HEALPixPolar

class astropy.modeling.projections.Pix2Sky_HEALPixPolar(*args, **kwargs)[source]

Bases: astropy.modeling.projections.Pix2SkyProjection, astropy.modeling.projections.HEALPix

HEALPix polar, aka “butterfly” projection - pixel to sky.

Corresponds to the XPH projection in FITS WCS.