postgis: postgis (spatial objects for PostgreSQL)
postgis: 
postgis: PostGIS adds support for geographic objects to the PostgreSQL
postgis: object-relational database. In effect, PostGIS “spatially enables”
postgis: the PostgreSQL server, allowing it to be used as a backend spatial
postgis: database for geographic information systems (GIS), much like ESRI's
postgis: SDE or Oracle's Spatial extension. PostGIS follows the OpenGIS
postgis: “Simple Features Specification for SQL” and has been certified as
postgis: compliant with the “Types and Functions” profile.
postgis: 
postgis: