Example: Heights of Terrain Points
In the example, the base height ZMASTER of the building and the base height of the terrain is at the model's origin. The heights of points z1..z3 in the absolute and relative height system:
| Absolute | Relative | |
| z1 | 102.5 | -3.5 |
| z2 | 103.5 | -2.5 |
| z3 | 104.5 | -1.5 |
