Tool Maximum Flow Path Length
This tool calculates the maximum upstream or downstream distance or weighted distance along the flow path for each cell based on 'Deterministic 8 (D8)' (O'Callaghan and Mark 1984) flow directions.
References
- O'Callaghan, J.F. & Mark, D.M. (1984): The extraction of drainage networks from digital elevation data. Computer Vision, Graphics and Image Processing, 28:323-344.
- Author: O.Conrad (c) 2016
- Menu: Terrain Analysis|Hydrology|Flow Accumulation
Parameters
| | Name | Type | Identifier | Description | Constraints |
|---|
| Input | Elevation | Grid (input) | ELEVATION | - | - |
| Weights (*) | Grid (optional input) | WEIGHTS | - | - |
| Output | Flow Path Length | Grid (output) | DISTANCE | - | - |
| Options | Grid system | Grid system | PARAMETERS_GRID_SYSTEM | - | - |
| Direction of Measurement | Choice | DIRECTION | - | Available Choices:
[0] downstream
[1] upstream
Default: 0 |
| (*) optional |
Command-line
Usage: saga_cmd ta_hydrology 27 [-ELEVATION <str>] [-WEIGHTS <str>] [-DISTANCE <str>] [-DIRECTION <str>]
-ELEVATION:<str> Elevation
Grid (input)
-WEIGHTS:<str> Weights
Grid (optional input)
-DISTANCE:<str> Flow Path Length
Grid (output)
-DIRECTION:<str> Direction of Measurement
Choice
Available Choices:
[0] downstream
[1] upstream
Default: 0