NAME

d.param.scale - GRASS module that allows interactive indentification of terrain parameters and features with a mouse. Reports membership classes for variable window sizes and their variance or entropy.

Usage:

d.param.scale [-cft] in=name [s_tol=value] [c_tol=value] [size=value] [param=name] [exp=value] [zscale=value]

Flags:

-c Constrain model through central window cell

-f Fix axis scale

-t Create text output of results

Parameters:

 in Raster surface layer to interrogate

 s_tol Slope tolerance that defines a `flat' surface (degrees)
default: 1.0

 c_tol Curvature tolerance that defines `planar' surface
default: 1.0

 size Size of processing window (odd number only)
default: 15

 param Morphometric parameter to calculate
options: elev,slope,aspect,profc,planc,longc,crosc,minic,maxic, feature,resid,moran,geary
default: elev

 exp Exponent for distance weighting (0.0-4.0)
default: 0.0

 zscale Vertical scaling factor
default: 1.0

 

d.param.scale can calculate the following:

 elev: Generalised elevation value.

 slope: Maximum gradient at a point.

 aspect: Direction of maximum gradient.

 profc: Profile convexity (vertical in direction of steepest slope).

 planc: Plan convexity (contour curvature).

 crosc: Cross sectional convexity (tangent to contours, downslope).

 longc: Longitudinal convexity (perpendicular to contours downslope).

 minic: Minimum convexity.

 maxic: Maximum convexity.

 features: Morphometric features:
                  peaks, ridges, passes, channels, pits and planes.
 

SEE ALSO

r.param.scale

jwo@le.ac.uk

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