Developer’s corner

[[h3c]]

H3C: a PostgreSQL library to deal with positions

H3C (HEALPix-Tree -C) is a PostgreSQL library which contains functions to index positions (ra,de) with HEALPix and others useful functions like cone search, crossmatch, etc.

H3C is based on Q3C. The functions are similar in name and in functionalities in the both library (except the prefix name and the Polygons functions limited for convex only in H3C).

healpix.jpl.nasa.gov_images_healpixgridrefinement.jpg

H3C uses the HEALPix library provided by the Nasa : http://sourceforge.net/projects/healpix/

Depending of the PostgreSQL installation, H3C needs an appropriate tuning. see H3C tuning.

h3c.txt · Last modified: 2020/06/30 16:20 by Gilles Landais

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