postgis: postgis (support for geographic objects in PostgreSQL) postgis: postgis: PostGIS adds support for geographic objects to the PostgreSQL postgis: database. In effect, PostGIS "spatially enables" the PostgreSQL postgis: server, allowing it to be used as a backend spatial database for postgis: geographic information systems (GIS), much like ESRI's SDE or postgis: Oracle's Spatial extension. postgis: postgis: http://postgis.org postgis: postgis: