# Polygon Shape Indices

(c) 2008 by O.Conrad
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.

## Parameters

Shapes
Input Shapes
Shape Index
Output Shapes