PostGIS

ST_AddIsoNode — Adds an isolated node to a face in a topology and returns the nodeid of the new node. If face is null, the node is still created.

integer +`*`+ST_AddIsoNode*(`varchar `atopology, integer aface, geometry apoint`)`;

Adds an isolated node with point location apoint to an existing face with faceid aface to a topology atopology and returns the nodeid of the new node.

If the spatial reference system (srid) of the point geometry is not the same as the topology, the apoint is not a point geometry, the point is null, or the point intersects an existing edge (even at the boundaries) then an exception is thrown. If the point already exists as a node, an exception is thrown.

If aface is not null and the apoint is not within the face, then an exception is thrown.

Availability: 1.1

This method implements the SQL/MM specification. SQL-MM: Topo-Net Routines: X+1.3.1

AddNode, CreateTopology, DropTopology, ST_Intersects