Diversity of Categories
- Author: O.Conrad (c) 2015
- Menu: Grid | Analysis | Diversity
Description
Grid based analysis of diversity. It is assumed that the input grid provides a classification (i.e. not a contiuous field). For each cell it counts the number of different categories (classes) as well as the connectivity within the chosen search window.
Parameters
| | Name | Type | Identifier | Description | Constraints |
|---|
| Input | Categories | grid, input | CATEGORIES | - | - |
| Output | Number of Categories | grid, output | COUNT | number of different categories (unique values) within search area | - |
| Diversity | grid, output | DIVERSITY | distance weighted average of the number of different categories for distance classes | - |
| Connectivity | grid, output | CONNECTIVITY | - | - |
| Averaged Connectivity | grid, output | CONNECTEDAVG | average size of the area covered by each category that occurs within search area | - |
| Options | Grid System | grid system | PARAMETERS_GRID_SYSTEM | - | - |
| Connectivity Neighbourhood | choice | NB_CASE | - | Available Choices:
[0] Rook's case
[1] Queen's case
Default: 1 |
| Normalize | choice | NORMALIZE | - | Available Choices:
[0] no
[1] by number of cells
[2] by area size
Default: 0 |
| 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 |
| Weighting Function | choice | DW_WEIGHTING | - | Available Choices:
[0] no distance weighting
[1] inverse distance to a power
[2] exponential
[3] gaussian
Default: 3 |
| Power | floating point number | DW_IDW_POWER | - | Minimum: 0.000000
Default: 2.000000 |
| Bandwidth | floating point number | DW_BANDWIDTH | Bandwidth for exponential and Gaussian weighting | Minimum: 0.000000
Default: 0.700000 |
Command Line
Usage: saga_cmd grid_analysis 21 [-CATEGORIES ] [-COUNT ] [-DIVERSITY ] [-CONNECTIVITY ] [-CONNECTEDAVG ] [-NB_CASE ] [-NORMALIZE ] [-KERNEL_TYPE ] [-KERNEL_RADIUS ] [-DW_WEIGHTING ] [-DW_IDW_POWER ] [-DW_BANDWIDTH ]
-CATEGORIES: Categories
grid, input
-COUNT: Number of Categories
grid, output
-DIVERSITY: Diversity
grid, output
-CONNECTIVITY: Connectivity
grid, output
-CONNECTEDAVG: Averaged Connectivity
grid, output
-NB_CASE: Connectivity Neighbourhood
choice
Available Choices:
[0] Rook's case
[1] Queen's case
Default: 1
-NORMALIZE: Normalize
choice
Available Choices:
[0] no
[1] by number of cells
[2] by area size
Default: 0
-KERNEL_TYPE: Kernel Type
choice
Available Choices:
[0] Square
[1] Circle
Default: 1
-KERNEL_RADIUS: Radius
integer number
Minimum: 0
Default: 2
-DW_WEIGHTING: Weighting Function
choice
Available Choices:
[0] no distance weighting
[1] inverse distance to a power
[2] exponential
[3] gaussian
Default: 3
-DW_IDW_POWER: Power
floating point number
Minimum: 0.000000
Default: 2.000000
-DW_BANDWIDTH: Bandwidth
floating point number
Minimum: 0.000000
Default: 0.700000