Maximum Flow Path Length
- Author: O.Conrad (c) 2016
- Menu: Terrain Analysis | Hydrology | Flow Accumulation
Description
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. doi:10.1016/S0734-189X(84)80011-0.
Parameters
| Name | Type | Identifier | Description | Constraints | |
|---|---|---|---|---|---|
| Input | Elevation | grid, input | ELEVATION | - | - |
| Weights | grid, input, optional | 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 |
Command Line
Usage: saga_cmd ta_hydrology 27 [-ELEVATION] [-WEIGHTS ] [-DISTANCE ] [-DIRECTION ] -ELEVATION: Elevation grid, input -WEIGHTS: Weights grid, input, optional -DISTANCE: Flow Path Length grid, output -DIRECTION: Direction of Measurement choice Available Choices: [0] downstream [1] upstream Default: 0