PostGIS
Description
A composite type that refers to a topology geometry in a specific topology layer, having a specific type and a specific id. The elements of a TopoGeometry are the properties: topology_id, layer_id, id integer, type integer.
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topology_idis an integer: Refers to a topology defined in the topology.topology table which defines the topology schema and srid. -
layer_idis an integer: The layer_id in the layers table that the TopoGeometry belongs to. The combination of topology_id, layer_id provides a unique reference in the topology.layers table. -
idis an integer: The id is the autogenerated sequence number that uniquely defines the topogeometry in the respective topology layer. -
typeinteger between 1 - 4 that defines the geometry type: 1:[multi]point, 2:[multi]line, 3:[multi]poly, 4:collection
Casting Behavior
This section lists the automatic as well as explicit casts allowed for this data type
Cast To |
Behavior |
geometry |
automatic |