Tool Name	Simpson Index
Tool ID	23
Library ID	grid_analysis
Version	1.0
Author(s)	O.Conrad (c) 2019

Description

Grid based analysis of diversity with the Simpson Index. The index is calculated locally for each grid cell using the specified kernel (aka 'moving window'). It is assumed that the grid cell values represent a classification.

References

Simpson, E.H. (1949): Measurement of diversity. Nature, 163:688. doi:10.1038/163688a0.

Parameters

Name	Type	Identifier	Description	Constraints
Input
Categories	grid, input	CATEGORIES
Output
Number of Categories	grid, output, optional	COUNT	number of different categories (unique values) within search area
Simpson Index	grid, output	INDEX
Options
Kernel Type	choice	KERNEL_TYPE	The kernel's shape.	Available Choices: [0] Square [1] Circle Default: 1
Radius	integer number	KERNEL_RADIUS	cells	Minimum: 0 Default: 2