Tool Rao's Q Diversity Index (Classic)
Grid based analysis of diversity with Rao's Q Index. Rao's Q diversity index is calculated locally for each grid cell using the specified kernel (aka 'moving window'). It is assumed that the grid cell values represent quantities.
References
- Rocchini, D., Marcantonio, M., Ricotta, C. (2017): Measuring Rao's Q diversity index from remote sensing: An open source solution. Ecological Indicators, Volume 72, p. 234-238. doi:10.1016/j.ecolind.2016.07.039..
- Author: O.Conrad (c) 2019
- Menu: Grid|Analysis|Diversity
Parameters
| Name | Type | Identifier | Description | Constraints | |
|---|---|---|---|---|---|
| Input | Values | grid, input | VALUES | - | - |
| Output | Number of Categories (*) | grid, output, optional | COUNT | number of different categories (unique values) within search area | - |
| Rao's Q | grid, output | INDEX | - | - | |
| Options | Grid System | grid system | PARAMETERS_GRID_SYSTEM | - | - |
| 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 | |
| (*) optional | |||||
Command-line
Usage: saga_cmd grid_analysis 24 [-VALUES <str>] [-COUNT <str>] [-INDEX <str>] [-KERNEL_TYPE <str>] [-KERNEL_RADIUS <num>] -VALUES:<str> Values grid, input -COUNT:<str> Number of Categories grid, output, optional -INDEX:<str> Rao's Q grid, output -KERNEL_TYPE:<str> Kernel Type choice Available Choices: [0] Square [1] Circle Default: 1 -KERNEL_RADIUS:<num> Radius integer number Minimum: 0 Default: 2