Changes between Version 4 and Version 5 of UsersWikiTopoGeometry
- Timestamp:
- 03/15/12 15:35:00 (13 years ago)
Legend:
- Unmodified
- Added
- Removed
- Modified
-
UsersWikiTopoGeometry
v4 v5 2 2 3 3 4 A !TopoGeometryis a PostGIS type used to represent geometries defined5 by Topological elements (Face,Edge,Node,!TopoGeometry).4 A '''!TopoGeometry''' is a PostGIS type used to represent geometries defined 5 by topological elements (face, edge, node,!TopoGeometry). 6 6 7 7 Current code implements the !TopoGeometry using a class defined 8 under the topology schema ( topology.!TopoGeometry). This has the8 under the topology schema (`topology.!TopoGeometry`). This has the 9 9 following fields: 10 10 11 * topology_id integer12 * layer_id integer13 * id integer14 * type integer11 * `topology_id integer` 12 * `layer_id integer` 13 * `id integer` 14 * `type integer` 15 15 16 The actual _definition_ of each !TopoGeometry is contained in the [wiki:TopologyTableRelation relation] table of the topology identified by "topology_id". The "relation" table contains a record for each component of each TopoGeometry. Interpretation of the component also requires looking at the [wiki:TopologyTableLayer topology.layer] table, which tells if element_type refers to primitive type (node, edge, face) or another layer (in case of hierarchical !TopoGeometry).16 The actual _definition_ of each !TopoGeometry is contained in the [wiki:TopologyTableRelation relation] table of the topology identified by `topology_id`. The "relation" table contains a record for each component of each !TopoGeometry. Interpretation of the component also requires looking at the [wiki:TopologyTableLayer topology.layer] table, which tells if element type refers to primitive type (node, edge, face) or another layer (in case of hierarchical !TopoGeometry). 17 17 18 18 See [wiki:UsersWikiCreatingTopoGeometryObjects CreatingTopoGeometryObjects] for information on how to create a !TopoGeometry.