Use the function mphmeasure to measure the geometry entities in the model.
The output measure return the value of a coordinates, a length, an area or volume, respectively. For point entities, if you select two or more points, the output correspond to the midpoint coordinates.
where sel is an integer array that contains the selection number of the entities to measure.
where msr2 corresponds to a surface area when the entities are volumes and a distance when the input entities are two points.