A measure is a value that conveys information about a geographic feature and that is stored together with the coordinates that define the feature's location. For example, suppose that you are representing transportation systems in your GIS. If you want your application to process values that denote linear distances or mileposts, you can store these values along with the coordinates that define the locations of the systems. Measures are stored as double precision numbers.
The IsMeasured predicate takes a geometry and returns a 1 (TRUE) if it contains measures and 0 (FALSE) otherwise. For more information, see IsMeasured.