libhealpix-cxx-dev - 3.83.0-2 main

HEALPix is an acronym for Hierarchical Equal Area isoLatitude Pixelization
of a sphere. As suggested in the name, this pixelization produces a
subdivision of a spherical surface in which each pixel covers the same
surface area as every other pixel. It is commonly used to store all-sky
astronomical images, most famously maps of the cosmic microwave background.
.
This package provides the static library and headers for the C++ language
implementation of HEALPix. The C++ library provides input/output, basic
spatial operations such as conversion between spherical coordinates and
HEALPix pixels, and also sophisticated spatial operations such as querying
cones or polygons, as well as upsampling/downsampling, smoothing, and fast
spherical harmonic transforms.