This is an R-Tree implementation using GiST for spherical objectslike spherical points and spherical circles with useful functions and operators.NOTICE:     This version will work only with postgresql version 9.1 and above.INSTALLATION:  -- build and install  gmake USE_PGXS=1 PG_CONFIG=/usr/bin/pg_config  gmake USE_PGXS=1 PG_CONFIG=/usr/bin/pg_config install  -- load extension  psql -c "CREATE EXTENSION pg_sphere;" <database>REGRESSION TEST (as the same user as the currently running postgresql server):  make USE_PGXS=1 installcheckLONG REGRESSION TEST:  make USE_PGXS=1 crushtestThe 'make' program must be compatible with GNU make.For more information, have a look athttp://pgsphere.projects.postgresql.organdhttps://github.com/akorotkov/pgsphereHave a lot of fun!