| 1 | | Each postgis topology contains a "relation" table which defines the composition of every TopoGeometry bound to the topology. For each !TopoGeometry you have a set of element_type/element_id components. Interpretation of "element_type" depends on [wiki:TopologyTableLayer layer] definition: it is 1:Node, 2:Edge, 3:Face for non-hierarchical layers and a layer identifier for hierarchical layers. |
| | 1 | == Topology Relation Table == |
| | 2 | |
| | 3 | Each PostGIS topology contains a "relation" table which defines the composition of every `TopoGeometry` bound to the topology. For each `TopoGeometry` you have a set of `element_type/element_id` components. Interpretation of "element_type" depends on [wiki:TopologyTableLayer layer] definition: it is 1:Node, 2:Edge, 3:Face for non-hierarchical layers and a layer identifier for hierarchical layers. |
