The Proximity Index is the average Euclidean distance from all interior points to the centroid of the shape. The Proximity index is normalized using the Equal Area Circle (EAC) as follows...

The Proximity Index gives all points in the shape an equal weight. It is appropriate to use when...

- the average distance from all interior points to the center is needed
- the distribution of the shape about the center is relevant
- a measure of compactness is needed

Proximity Index results for select shapes...