This calculates the proportion of the total area of a polygon's holes (i.e. islands) relative to the area of the polygon's hull. It can be a useful measure of shape complexity, or how discontinuous a patch is. The user must specify the name of the input vector file and the output data will be contained within the input vector's database file as a new field (HOLE_PROP).

## See Also

`ShapeComplexityIndex`, elongation_ratio, perimeter_area_ratio

## Function Signature

`def hole_proportion(self, input: Vector) -> Vector: ...`

## Project Links

WbW Homepage User Manual Support WbW