Surface Specific Points
- Author: O.Conrad (c) 2001
- Menu: Terrain Analysis | Terrain Classification
Description
Classification of raster cells representing surface-specific points.
References
- Band, L.E. (1986): Topographic partition of watersheds with Digital Elevation Models. Water Resources Research, 22.1, 15-24. doi:10.1029/WR022i001p00015.
- Peucker, T.K. & Douglas, D.H. (1975): Detection of surface-specific points by local parallel processing of discrete terrain elevation data. Computer Graphics and Image Processing, 4, 375-387. doi:10.1016/0146-664X(75)90005-2.
Parameters
| | Name | Type | Identifier | Description | Constraints |
|---|
| Input | Elevation | grid, input | ELEVATION | - | - |
| Output | Surface Specific Points | grid, output | RESULT | - | - |
| Options | Grid System | grid system | PARAMETERS_GRID_SYSTEM | - | - |
| Method | choice | METHOD | Algorithm for the detection of Surface Specific Points | Available Choices:
[0] Flagging Neighbours of Highest Elevation
[1] Opposite Neighbours
[2] Flow Direction (down)
[3] Flow Direction (up and down)
[4] Peucker & Douglas
Default: 1 |
| Threshold | floating point number | THRESHOLD | Threshold for Peucker & Douglas Algorithm | Default: 1.000000 |
Command Line
Usage: saga_cmd ta_morphometry 3 [-ELEVATION ] [-RESULT ] [-METHOD ] [-THRESHOLD ]
-ELEVATION: Elevation
grid, input
-RESULT: Surface Specific Points
grid, output
-METHOD: Method
choice
Available Choices:
[0] Flagging Neighbours of Highest Elevation
[1] Opposite Neighbours
[2] Flow Direction (down)
[3] Flow Direction (up and down)
[4] Peucker & Douglas
Default: 1
-THRESHOLD: Threshold
floating point number
Default: 1.000000