Give pixel area given nside.
Parameters : | nside : int
degrees : bool
|
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Returns : | pixarea : float
|
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: Given number is not a valid nside parameter (must be a power of 2)