Name
ST_MMax — Returns the M maxima of a geometry.
Synopsis
float ST_MMax(geometry geom);
Description
Returns the M maxima of a geometry, or null if the geometry lacks M values.
This function supports 3d and will not drop the z-index.
This method supports Circular Strings and Curves.
Examples
SELECT ST_MMax('POINT M (1 2 3)');
st_mmax
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3