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Checks for the presence of M coordinate values representing measures or linear references. Returns true if the input geometry includes an M coordinate, false otherwise. ST_HasM

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Signatures

ST_HasM(geom: Geometry)

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Parameters

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geom
Geometry
required
The input geometry.

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Return type

Returns true or false.

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Example

SELECT ST_HasM(
        ST_GeomFromWKT('POLYGON ZM ((30 10 5 1, 40 40 10 2, 20 40 15 3, 10 20 20 4, 30 10 5 1))')
)

True