Rao's Q Diversity Index (Classic)
- Author: O.Conrad (c) 2019
- Menu: Grid | Analysis | Diversity
Description
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..
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 |
Command Line
Usage: saga_cmd grid_analysis 24 [-VALUES ] [-COUNT ] [-INDEX ] [-KERNEL_TYPE ] [-KERNEL_RADIUS ]
-VALUES: Values
grid, input
-COUNT: Number of Categories
grid, output, optional
-INDEX: Rao's Q
grid, output
-KERNEL_TYPE: Kernel Type
choice
Available Choices:
[0] Square
[1] Circle
Default: 1
-KERNEL_RADIUS: Radius
integer number
Minimum: 0
Default: 2