| PostGIS
adds support for geographic objects to the PostgreSQL object-relational
database. In effect, PostGIS "spatially enables"
the PostgreSQL server, allowing it to be used as a backend
spatial database for geographic information systems (GIS),
much like ESRI's SDE or Oracle's Spatial extension. PostGIS
follows the OpenGIS "Simple Features Specification for
SQL" and will be submitted for conformance testing at
version 1.0. |