HEALPix A software for hierarchical equal area isoLatitude pixelization of a sphere
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visualize analyze sphere visualization sphere analysis sphere pixelization pixelize

HEALPix Description

A software for hierarchical equal area isoLatitude pixelization of a sphere HEALPix is an open source software for pixelization, hierarchical indexation, synthesis, analysis, and visualization of data on the sphere. As suggested in the name, the pixelization will produce a subdivision of a spherical surface in which each of the pixels covers the same surface area as every other pixel.The current version of the HEALPix package (to be updated semi-regularly) contains a suite of programs which allow all of the following (and more):· Programs for fast simulation and analysis of full-sky maps of CMB temperature and polarization anisotropy (sky maps preview) up to sub-arcminute angular resolution (your computer's RAM permitting, see benchmarks).· Routines to read and write the FITS formatted map data sets, and allowing the IDL-based display of your results.· Programs to search the maps for pixel neighbours and extrema of a random field.· Programs to manage, modify and rotate spherical harmonic coefficients of arbritrary maps· Programs to perform median filtering of sky maps· Automated installation and build scripts.· Most critical routines are parallelised· Fortan 90 and C++ implementation· Optimised P_lm recursion for better performance (2 to 3 times faster than previous release).· Radek Stompor's P_lm recursion accurate for computations up to l = 10000.· A constrained realization facility.· Improved IDL display and file handling routines.· An IDL toolkit for pixel manipulation and FITS file manipulation.· A Fortran 90 MAP2GIF visualization facility.· Improved documentation (PDF and HTML)

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