PostGIS
Name
ST_ModEdgeSplit — Split an edge by creating a new node along an existing edge, modifying the original edge and adding a new edge.
Description
Split an edge by creating a new node along an existing edge, modifying the original edge and adding a new edge. Updates all existing joined edges and relationships accordingly. Returns the identifier of the newly added node.
Availability: 1.1
Changed: 2.0 - In prior versions, this was misnamed ST_ModEdgesSplit
This
method implements the SQL/MM specification.
SQL-MM: Topo-Geo and Topo-Net 3: Routine Details: X.3.9
Examples
-- Add an edge --
SELECT topology.AddEdge('ma_topo', ST_GeomFromText('LINESTRING(227592 893910, 227600 893910)', 26986) ) As edgeid;
-- edgeid-
3
-- Split the edge --
SELECT topology.ST_ModEdgeSplit('ma_topo', 3, ST_SetSRID(ST_Point(227594,893910),26986) ) As node_id;
node_id
-------------------------
7