Pix2Sky_HEALPixPolar#

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

Bases: Pix2SkyProjection, HEALPix

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

Corresponds to the XPH projection in FITS WCS.