PostGIS  2.5.1dev-r@@SVN_REVISION@@

◆ PG_FUNCTION_INFO_V1() [16/23]

PG_FUNCTION_INFO_V1 ( LWGEOM_m_point  )

M(GEOMETRY) – find the first POINT(..) in GEOMETRY, returns its M value.

Returns
NULL if there is no POINT(..) in GEOMETRY. Return NULL if there is no M in this geometry.