Binary package “postgresql-9.1-postgis” in ubuntu precise
Geographic objects support for PostgreSQL 9.1
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".
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This package supports PostgreSQL 9.1.