Tests whether a 3D LineString or 3D MultiLineString is closed, taking into account the z coordinates in the calculation.
Valid Data Types
LineString and MultiLineString types that include z coordinates
Result Type
Returns an INTEGER value:
- 1 if the 3D LineString or 3D MultiLineString is closed.
- 0 if the 3D LineString or 3D MultiLineString is not closed or is empty.
If the input geometry is not a 3D LineString or 3D MultiLineString, ST_3DIsClosed returns an error.