liblwgeom-dev - 2.5.1+dfsg-1 main

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 library is the generic geometry handling section of PostGIS. The
geometry objects, constructors, destructors, and a set of spatial
processing functions, are implemented here. This package contains
the development files.