ST_SRID — Gibt den räumlichen Referenzbezeichner für eine Topogeometrie zurück.
integer ST_SRID(topogeometry tg);
Returns the spatial reference identifier of the topology containing the TopoGeometry.
The identifier is recorded for the topology when it is created and refers to an entry in Abschnitt 4.5, „Räumliche Bezugssysteme“.
Verfügbarkeit: 3.2.0
Return the SRID of a TopoGeometry stored in the ri_topo topology.
SELECT topology.ST_SRID(topo) AS srid FROM ri.roads WHERE road_name = 'Unknown';
srid ------ 3438