healpy.pixelfunc.nside2pixarea¶
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healpy.pixelfunc.
nside2pixarea
(nside, degrees=False)¶ Give pixel area given nside in square radians or square degrees.
Parameters: nside : int
healpix nside parameter, must be a power of 2, less than 2**30
degrees : bool
if True, returns pixel area in square degrees, in square radians otherwise
Returns: pixarea : float
pixel area in square radian or square degree
Notes
Raise a ValueError exception if nside is not valid.
Examples
>>> import healpy as hp >>> hp.nside2pixarea(128, degrees = True) 0.2098234113027917
>>> hp.nside2pixarea(256) 1.5978966540475428e-05
>>> hp.nside2pixarea(7) Traceback (most recent call last): ... ValueError: 7 is not a valid nside parameter (must be a power of 2, less than 2**30)