ST_PointOnSurface method for type ST_Surface

ST_PointOnSurface method for type ST_Surface

Returns an ST_Point value that is guaranteed to spatially intersect the ST_Surface value.

Note

If the surface-expression contains circular strings, then these are interpolated to line strings.

Syntax

surface-expression.ST_PointOnSurface()

Returns

ST_Point If the surface is the empty set, returns NULL. Otherwise, returns an ST_Point value guaranteed to spatially intersect the ST_Surface value.
The spatial reference system identifier of the result is the same as the spatial reference system of the surface-expression.

Standards and compatibility

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