Polygon Shape Indices

Various indices describing the shape of polygons. Based on area, perimeter, maximum distance between the vertices of a polygon.

- Interior Edge Ratio (Perimeter / Area)
- Shape Index (Perimeter / (2 * SquareRoot(PI * Area))

References:
Lang, S., Blaschke, T. (2007): Landschaftsanalyse mit GIS.

Forman, R.T.T., Godron, M. (1986): Landscape Ecology. Cambridge.