npm

healpix

Hierarchical pixelization of spheres for astronomical data analysis

brewmacoslinux
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Source

About

Hierarchical Equal Area isoLatitude Pixelization of a sphere

Commands

query_discang2pixpix2angnest2ringring2nest

Examples

Convert angular coordinates to HEALPix pixel index$ ang2pix nside=64 lon=10.5 lat=20.3
Convert HEALPix pixel to angular coordinates$ pix2ang nside=64 pixel=12345
Find all pixels within a disc on the sphere$ query_disc nside=128 lon=180 lat=0 radius=10