Augmented Projection-Based SRFs
Many applications 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
Map projections distort geometry relationships, augmentation leads to additional geometric distortions
Augmentation affects dynamics formulations