Another key feature is the ability to store and manipulate geometric data, such as lines, circles, and polygons.PostgreSQL has its own query language called pgsql. This language is a variant of the standard rel
are described by a set of geometric and non-geometric properties called attributes (Fig. 1). A geometric attribute instance is the position and shape (and even topology) of a feature that can be expressed through geometries such as points, lines and polygons (as a sequence of co-ordinates...
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