Tool Name	Relative Heights and Slope Positions
Tool ID	14
Library ID	ta_morphometry
Version	1.0
Author(s)	J.Böhner, O.Conrad (c) 2008

Description

This tool calculates several terrain indices related to the terrain position from a digital elevation model using an iterative approach. You can control the results with three parameters.
The parameter 'w' weights the influence of catchment size on relative elevation (inversely proportional).
The parameter 't' controls the amount by which a maximum in the neighbourhood of a cell is taken over into the cell (considering the local slope between the cells). The smaller 't' and/or the smaller the slope, the more of the maximum value is taken over into the cell. This results in a greater generalization/smoothing of the result. The greater 't' and/or the higher the slope, the less is taken over into the cell and the result will show a more irregular pattern caused by small changes in elevation between the cells.
The parameter 'e' controls the position of relative height maxima as a function of slope. More details about the computational concept can be found in Boehner & Selige (2006).

Parameters

Name	Type	Identifier	Constraints
Input
Elevation	grid, input	DEM
Output
Slope Height	grid, output	HO
Valley Depth	grid, output	HU
Normalized Height	grid, output	NH
Standardized Height	grid, output	SH
Mid-Slope Position	grid, output	MS
Options
w	floating point number	W	Minimum: 0.000000 Default: 0.500000
t	floating point number	T	Minimum: 0.000000 Default: 10.000000
e	floating point number	E	Minimum: 0.000000 Default: 2.000000