Astrophysics (Index)About

HEALPix

(type of map projection for spheres)

HEALPix is a type of map projection that can be used for a map of Earth (i.e., an alternate to the Mercator projection) or a spherical surface such as the celestial sphere. It is used for display and also is used as the basis for formats for storing the data over the 2D of a sphere surface, and also is the name of one of the pieces of software for producing and using the format and projection.

HEALPix is not the project commonly used to display the cosmic microwave background (or other intensity maps) as an oval: that is a Mollweide projection.


HEALPix is also the name of software that the deals with the HEALPix projection and also data formats (HEALPix format) used by the software and for some astronomical projects.


(mathematics)
Further reading:
http://en.wikipedia.org/wiki/HEALPix
http://en.wikipedia.org/wiki/Mollweide_projection
https://healpix.jpl.nasa.gov/
https://healpix.jpl.nasa.gov/html/intronode5.htm
https://gamma-astro-data-formats.readthedocs.io/en/latest/skymaps/healpix/

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