GRASS GIS manual: r.valley.bottom

NAME

r.valley.bottom - Calculation of Multi-resolution Valley Bottom Flatness (MrVBF) index

KEYWORDS

raster, terrain

SYNOPSIS

r.valley.bottom

r.valley.bottom --help

r.valley.bottom [-s] elevation=name [--help] [--verbose] [--quiet] [--ui]

Flags:

-s: Use square moving window instead of moving window in 8 directions
--help: Print usage summary
--verbose: Verbose module output
--quiet: Quiet module output
--ui: Force launching GUI dialog

Parameters:

elevation=name [required]: Name of elevation raster map

DESCRIPTION
EXAMPLE
NOTES
TODO
SEE ALSO
REFERENCES
AUTHOR

DESCRIPTION

r.valley.bottom calculates a Multi-resolution Valley Bottom Flatness (MrVBF) index. The user must specify the input elevation raster map.

Default moving window is cells in 8 directions. With the -s flag a square moving window is used in calculations.

EXAMPLE

  # align region to DEM and habitat vector
  g.region -a raster=DEM align=DEM

  # run r.valley.bottom
  r.r.valley.bottom elevation=DEM

Design the script independent of input elevation raster resolution. At the moment the input elevation raster map must have a resolution of 25m x 25m. Additionally the search window of the elevation percentile may be adapted.

REFERENCES

J.C. Gallant & T.I. Dowling 2003. A multiresolution index of valley bottom flatness for mapping depositional areas. Water Resources Research, Vol. 39, No. 12, 1347. doi:10.1029/2002WR001426

AUTHOR

Helmut Kudrnovsky

Last changed: $Date: 2015-01-03 23:50:11 +0100 (Sat, 03 Jan 2015) $

SOURCE CODE

Available at: r.valley.bottom source code (history)