Module Change Vector Analysis
This module performs a change vector analysis (CVA) for the given input features. Input features are supplied as grid lists for initial and final state. In both lists features have to be given in the same order. Distance is measured as Euclidean distance in features space. When analyzing two features direction is calculated as angle (radians) by default. Otherwise direction is coded as the quadrant it points to in terms of feature space.
- Author: V.Olaya (c) 2004, O.Conrad (c) 2012
- Menu: Imagery|Tools
Parameters
| | Name | Type | Identifier | Description | Constraints |
|---|
| Input | Initial State | Grid list (input) | A | - | - |
| Final State | Grid list (input) | B | - | - |
| Output | Distance | Grid (output) | DIST | - | - |
| Direction | Grid (output) | DIR | - | - |
| Change Vector (*) | Grid list (optional output) | C | - | - |
| Options | Grid system | Grid system | PARAMETERS_GRID_SYSTEM | Grid system | - |
| Angle Calculation | Boolean | ANGLE | angle calculation is only available when exact two features are compared | Default: 1 |
| Output of Change Vector | Boolean | C_OUT | - | Default: 0 |
| (*) optional |
Command-line
Usage: saga_cmd grid_analysis 6 [-A <str>] [-B <str>] [-DIST <str>] [-DIR <str>] [-ANGLE <str>] [-C_OUT <str>] [-C <str>]
-A:<str> Initial State
Grid list (input)
-B:<str> Final State
Grid list (input)
-DIST:<str> Distance
Grid (output)
-DIR:<str> Direction
Grid (output)
-ANGLE:<str> Angle Calculation
Boolean
Default: 1
-C_OUT:<str> Output of Change Vector
Boolean
Default: 0
-C:<str> Change Vector
Grid list (optional output)