As for relative height, it is usually measured in meters plitki.com. Moreover, it is worth noting that it is precisely this that will show the difference between the absolute height of geographical objects, as well as the height of the terrain. If the mountain has an absolute height of 2000 meters, but the surrounding area is located at an altitude of 1000 meters, then as for the comparative height of the mountain, it will be 1000 meters.