TopoGeometry — A composite type representing a topologically defined geometry


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.

  1. topology_id is an integer: Refers to a topology defined in the topology.topology table which defines the topology schema and srid.

  2. layer_id is 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.

  3. id is an integer: The id is the autogenerated sequence number that uniquely defines the topogeometry in the respective topology layer.

  4. type integer 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 ToBehavior

See Also