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Healpix functions for PostgreSQL
License: GNU General Public License v2.0
This project forked from segasai/pg_healpix
Healpix functions for PostgreSQL
License: GNU General Public License v2.0
PG_HEALPIX Author: Sergey Koposov, Institute of Astronomy, Cambridge and multiple HEALPIX authors (C) 2012 Email: [email protected] This software provides an SQL (PostgreSQL) interface for several HEALPIX functions, which allows you to convert the ra,dec coordinates into Healpix IDs and back. --------------------------------------------------------------------------------- Example: wsdb=> select healpix_ang2ipix_nest(1024, 12., 25.); healpix_ang2ipix_nest ----------------------- 5102321 (1 row) wsdb=> select healpix_ang2ipix_ring(1024, 12., 25.); healpix_ang2ipix_ring ----------------------- 3627144 (1 row) wsdb=> select healpix_ipix2ang_nest(1024, 4323); healpix_ipix2ang_nest -------------------------------- {47.63671875,3.24700649515993} (1 row) wsdb=> select healpix_ipix2ang_ring(1024, 4323); healpix_ipix2ang_ring ------------------------------------- {359.021739130435,87.8983556468228} (1 row) -------------------------------------------------------------------------------- Installation is standard: 1) Download the package 2) Compile the code using simple make Please check that you have pg_config in your path 3) Install the packge using make install 4) Load the functions into PostgreSQL by doing \i pg_healpix.sql from the psql client
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