Tool NameSlope, Aspect, Curvature
Tool ID0
Library IDta_morphometry
Version1.0
Author(s)O.Conrad (c) 2001

Description

Calculates the local morphometric terrain parameters slope, aspect and if supported by the chosen method also the curvature. Besides tangential curvature also its horizontal and vertical components (i.e. plan and profile curvature) can be calculated.

Parameters

NameTypeIdentifierDescriptionConstraints
Input
Elevationgrid, inputELEVATION
Output
Slopegrid, outputSLOPE
Aspectgrid, output, optionalASPECTStarting with 0 for the North direction angles are increasing clockwise.
Northnessgrid, output, optionalNORTHNESSThe aspect's cosine.
Eastnessgrid, output, optionalEASTNESSThe aspect's sine.
General Curvaturegrid, output, optionalC_GENE
Profile Curvaturegrid, output, optionalC_PROF
Plan Curvaturegrid, output, optionalC_PLAN
Tangential Curvaturegrid, output, optionalC_TANG
Longitudinal Curvaturegrid, output, optionalC_LONGZevenbergen & Thorne (1987) refer to this as profile curvature
Cross-Sectional Curvaturegrid, output, optionalC_CROSZevenbergen & Thorne (1987) refer to this as plan curvature
Minimal Curvaturegrid, output, optionalC_MINI
Maximal Curvaturegrid, output, optionalC_MAXI
Total Curvaturegrid, output, optionalC_TOTA
Flow Line Curvaturegrid, output, optionalC_ROTO
Options
MethodchoiceMETHODAvailable Choices:
[0] maximum slope (Travis et al. 1975)
[1] maximum triangle slope (Tarboton 1997)
[2] least squares fitted plane (Horn 1981, Costa-Cabral & Burgess 1996)
[3] 6 parameter 2nd order polynom (Evans 1979)
[4] 6 parameter 2nd order polynom (Heerdegen & Beran 1982)
[5] 6 parameter 2nd order polynom (Bauer, Rohdenburg, Bork 1985)
[6] 9 parameter 2nd order polynom (Zevenbergen & Thorne 1987)
[7] 10 parameter 3rd order polynom (Haralick 1983)
[8] 10 parameter 3rd order polynom (Florinsky 2009)
Default: 6
UnitchoiceUNIT_SLOPEAvailable Choices:
[0] radians
[1] degree
[2] percent rise
Default: 0
UnitchoiceUNIT_ASPECTAvailable Choices:
[0] radians
[1] degree
Default: 0