Name
ST_ForceCurve — Upcast a geometry into its curved type, if applicable.
Synopsis
geometry ST_ForceCurve(geometry g);
Descrizione
Turns a geometry into its curved representation, if applicable: lines become compoundcurves, multilines become multicurves polygons become curvepolygons multipolygons become multisurfaces. If the geometry input is already a curved representation returns back same as input.
Disponibilità: 2.2.0
Questa funzione supporta il 3d e non distrugge gli z-index.
Questo metodo supporta le Curve e le Circular String.
Esempi
SELECT ST_AsText(
ST_ForceCurve(
'POLYGON((0 0 2, 5 0 2, 0 5 2, 0 0 2),(1 1 2, 1 3 2, 3 1 2, 1 1 2))'::geometry
)
);
st_astext
----------------------------------------------------------------------
CURVEPOLYGON Z ((0 0 2,5 0 2,0 5 2,0 0 2),(1 1 2,1 3 2,3 1 2,1 1 2))
(1 row)