Rao's Q Diversity Index (Classic)
| Author(s) | O.Conrad (c) 2019 |
| Library ID | grid_analysis |
| Tool ID | 24 |
| Version | 1.0 |
| 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