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- r.param.scale
- GRASS module that extracts terrain parameters from a DEM.
- Uses a multi-scale approach by taking fitting quadratic
- parameters to any size window (via least squares).
- Jo Wood, 27th November, 1994.
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- Modified to include constrained fitting.
- Jo Wood, April, 1995
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- Modified to include weighting matrix and double precision arithmetic.
- Jo Wood, 9th May, 1995.
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- Modified to include two separate tolerance values for feature detection.
- Jo Wood, 23rd May, 1995.
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- Still to do:
- Fix bug when `constrain through central cell' option selected.
- Create colour tables for all output files (presently only on features).
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- See also Java Code in 'LandSerf' that implements the same procedure
- (http://www.geog.le.ac.uk/jwo/research/LandSerf).
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- Usage:
- r.param.scale [-c] in=name out=name [s_tol=value] [c_tol=value]
- [size=value] [param=name] [exp=value] [zscale=value]
- Flags:
- -c Constrain model through central window cell
- Parameters:
- in Raster surface layer to process
- out Output raster layer containing morphometric parameter
- 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: 3
- param Morphometric parameter to calculate
- options: elev,slope,aspect,profc,planc,longc,crosc,minic,maxic,
- feature
- default: elev
- exp Exponent for distance weighting (0.0-4.0)
- default: 0.0
- zscale Vertical scaling factor
- default: 1.0
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