Module Least Cost Paths
This module allows one to compute least cost path profile(s). It takes an accumulated cost surface grid and a point shapefile as input. Each point in the shapefile represents a source for which the least cost path is calculated.
In case the point shapefile has more than one source point defined, a separate least cost path is calculated for each point. The module outputs a point and a line shapefile for each least cost path.
The module allows for optional input grids. The cell values of these grids along the least cost path are written to the outputs as additional table fields.
- Author: O. Conrad, V. Olaya, V. Wichmann (c) 2004-2010
- Menu: Grid|Analysis|Cost Analysis
Parameters
| | Name | Type | Identifier | Description | Constraints |
|---|
| Input | Source Point(s) | Shapes (input) | SOURCE | Point shapefile with source point(s) | - |
| Accumulated Cost Surface | Grid (input) | DEM | - | - |
| Values (*) | Grid list (optional input) | VALUES | Allows writing cell values from additional grids to the output | - |
| Output | Profile Points | Shapes list (output) | POINTS | Least cost path profile points | - |
| Profile Lines | Shapes list (output) | LINE | Least cost path profile lines | - |
| Options | Grid system | Grid system | PARAMETERS_GRID_SYSTEM | Grid system | - |
| (*) optional |
Command-line
Usage: saga_cmd grid_analysis 5 [-SOURCE <str>] [-DEM <str>] [-VALUES <str>] [-POINTS <str>] [-LINE <str>]
-SOURCE:<str> Source Point(s)
Shapes (input)
-DEM:<str> Accumulated Cost Surface
Grid (input)
-VALUES:<str> Values
Grid list (optional input)
-POINTS:<str> Profile Points
Shapes list (output)
-LINE:<str> Profile Lines
Shapes list (output)