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