Augmented Projection-Based SRFs
Simulations usually require three dimensions.
Some SRFs are three dimensional by definition.
Map projections (two-dimensional) are commonly augmented with a vertical axis to create a three dimensional system.
Various vertical measures are used for these augmentations, such as:
- Mean sea level height, orthometric height, geodetic height, pressure altitude, and others.
This practice adds additional geometric distortions.