bilinear_interpolation_weights¶
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astropy_healpix.
bilinear_interpolation_weights
(lon, lat, nside, order='ring')[source]¶ Get the four neighbours for each (lon, lat) position and the weight associated with each one for bilinear interpolation.
Parameters: lon, lat :
Quantity
The longitude and latitude values as
Quantity
instances with angle units.nside : int
Number of pixels along the side of each of the 12 top-level HEALPix tiles
order : { ‘nested’ | ‘ring’ }
Order of HEALPix pixels
Returns: indices :
ndarray
2-D array with shape (4, N) giving the four indices to use for the interpolation
weights :
ndarray
2-D array with shape (4, N) giving the four weights to use for the interpolation