Summit Extraction
- Author: O.Conrad (c) 2019
- Menu: Terrain Analysis | Terrain Classification
Description
This is a simple summit detection tool, e.g. for the analysis of Digital Elevation Models. It calculates the distance above a trend surface (using either the grid resampling filter or the topographic position index) to decide, if a local maximum in the input surface grid represents a summit.
Parameters
Name | Type | Identifier | Description | Constraints | |
---|---|---|---|---|---|
Input | Surface | grid, input | SURFACE | - | - |
Output | Summits | shapes, output | SUMMITS | - | - |
Options | Grid system | grid system | SURFACE_GRIDSYSTEM | - | - |
Trend Surface | choice | METHOD | - | Available Choices: [0] Resampling Filter [1] Topographic Position Index (TPI) Default: 0 | |
Scale | floating point number | SCALE_FILTER | The scale (expressed as number of input grid cells) at which the trend surface will be created. | Minimum: 1.000000 Default: 10.000000 | |
Scale | floating point number | SCALE_TPI | The scale (expressed as map units) at which the trend surface will be created. | Minimum: 1.000000 Default: 300.000000 | |
Threshold | floating point number | THRESHOLD | The minimum distance above the trend surface for summit cells. | Minimum: 0.000000 Default: 10.000000 |
Command Line
Usage: saga_cmd ta_morphometry summits [-SURFACE] [-SUMMITS ] [-METHOD ] [-SCALE_FILTER ] [-SCALE_TPI ] [-THRESHOLD ] -SURFACE: Surface grid, input -SUMMITS: Summits shapes, output -METHOD: Trend Surface choice Available Choices: [0] Resampling Filter [1] Topographic Position Index (TPI) Default: 0 -SCALE_FILTER: Scale floating point number Minimum: 1.000000 Default: 10.000000 -SCALE_TPI: Scale floating point number Minimum: 1.000000 Default: 300.000000 -THRESHOLD: Threshold floating point number Minimum: 0.000000 Default: 10.000000