Reference/API

astropy_healpix Package

Functions

bilinear_interpolation_weights(lon, lat, nside)	Get the four neighbours for each (lon, lat) position and the weight associated with each one for bilinear interpolation.
boundaries_lonlat(healpix_index, step, nside)	Return the longitude and latitude of the edges of HEALPix pixels
healpix_to_lonlat(healpix_index, nside[, ...])	Convert HEALPix indices (optionally with offsets) to longitudes/latitudes.
healpix_to_xyz(healpix_index, nside[, dx, ...])	Convert HEALPix indices (optionally with offsets) to Cartesian coordinates.
interpolate_bilinear_lonlat(lon, lat, values)	Interpolate values at specific longitudes/latitudes using bilinear interpolation
level_ipix_to_uniq(level, ipix)	Convert a level and HEALPix index into a uniq number representing the cell.
level_to_nside(level)	Find the pixel dimensions of the top-level HEALPix tiles.
lonlat_to_healpix(lon, lat, nside[, ...])	Convert longitudes/latitudes to HEALPix indices
neighbours(healpix_index, nside[, order])	Find all the HEALPix pixels that are the neighbours of a HEALPix pixel
npix_to_nside(npix)	Find the number of pixels on the side of one of the 12 'top-level' HEALPix tiles given a total number of pixels.
nside_to_level(nside)	Find the HEALPix level for a given nside.
nside_to_npix(nside)	Find the number of pixels corresponding to a HEALPix resolution.
nside_to_pixel_area(nside)	Find the area of HEALPix pixels given the pixel dimensions of one of the 12 'top-level' HEALPix tiles.
nside_to_pixel_resolution(nside)	Find the resolution of HEALPix pixels given the pixel dimensions of one of the 12 'top-level' HEALPix tiles.
pixel_resolution_to_nside(resolution[, round])	Find closest HEALPix nside for a given angular resolution.
uniq_to_level_ipix(uniq)	Convert a HEALPix cell uniq number to its (level, ipix) equivalent.
xyz_to_healpix(x, y, z, nside[, ...])	Convert longitudes/latitudes to HEALPix indices

Classes

HEALPix([nside, order, frame])

A HEALPix pixellization.

astropy_healpix.healpy Module

This submodule provides a healpy-compatible interface.

Functions

nside2resol(nside[, arcmin])	Drop-in replacement for healpy nside2resol.
nside2pixarea(nside[, degrees])	Drop-in replacement for healpy nside2pixarea.
nside2npix(nside)	Drop-in replacement for healpy nside2npix.
npix2nside(npix)	Drop-in replacement for healpy npix2nside.
pix2ang(nside, ipix[, nest, lonlat])	Drop-in replacement for healpy pix2ang.
ang2pix(nside, theta, phi[, nest, lonlat])	Drop-in replacement for healpy ang2pix.
pix2vec(nside, ipix[, nest])	Drop-in replacement for healpy pix2vec.
vec2pix(nside, x, y, z[, nest])	Drop-in replacement for healpy vec2pix.
order2nside(order)	Drop-in replacement for healpy order2nside.
nest2ring(nside, ipix)	Drop-in replacement for healpy nest2ring.
ring2nest(nside, ipix)	Drop-in replacement for healpy ring2nest.
boundaries(nside, pix[, step, nest])	Drop-in replacement for healpy boundaries.
vec2ang(vectors[, lonlat])	Drop-in replacement for healpy vec2ang.
ang2vec(theta, phi[, lonlat])	Drop-in replacement for healpy ang2vec.
get_interp_weights(nside, theta[, phi, ...])	Drop-in replacement for healpy get_interp_weights.
get_interp_val(m, theta, phi[, nest, lonlat])	Drop-in replacement for healpy get_interp_val.