Vertical extent

measure for the independence of a summit defined as its relative height based on the difference between its absolute elevation and the lowest contour line encircling it but containing no higher summit within it

precision measuring tool used to determine the height of objects or mark out measurements on workpieces, commonly used in machining and quality control

distance from water to the highest point on a vessel or lowest point on a bridge span, etc.

thumb|Digital stadiometer with close up insert of the device's headpiece. A stadiometer is a piece of medical equipment used for measuring human height. It is usually constructed out of a ruler and a sliding horizontal headpiece which is adjusted to rest on the top of the head. Stadiometers are used in routine medical examinations and also clinical tests and experiments.