Flex Projector computes numerical indices for assessing projection distortion for the entire globe and continental areas only:
• Scale - the weighted mean error for overall scale distortion
• Areal - the weighted mean error for areal distortion
• Angular - the mean angular deformation index.
Q is an additional numerical measure that summarizes overall projection distortion.
As the user modifies a Flex projection, the Distortion Table automatically updates every change and ranks the projection compared to other well-known world projections from best (top) to worst (bottom).
Associated with the Distortion table are tabs that display Distortion Profiles and Flex Curves. The information in these graphs alerts the user about otherwise unseen distortion irregularities in a projection.