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r.carve
Langue: en
Version: 370824 (fedora - 01/12/10)
Section: 1 (Commandes utilisateur)
NAME
r.carve - Takes vector stream data, transforms it to raster and subtracts depth from the output DEM.KEYWORDS
rasterSYNOPSIS
r.carver.carve help
r.carve [-nq] rast=name vect=name output=name [points=name] [width=float] [depth=float] [--overwrite] [--verbose] [--quiet]
Flags:
- -n
No flat areas allowed in flow direction- -q
Run quietly- --overwrite
Allow output files to overwrite existing files- --verbose
Verbose module output- --quiet
Quiet module output
Parameters:
- rast=name
Name of input raster elevation map- vect=name
Name of vector input map containing stream(s)- output=name
Name for output raster map- points=name
Name for output vector map for adjusted stream points- width=float
Stream width (in meters). Default is raster cell width- depth=float
Additional stream depth (in meters)
DESCRIPTION
r.carve accepts vector stream data as input, transforms them to raster, and subtracts a defaultdepth+additionaldepth from a DEM. If the given width is more than 1 cell, it will carve the stream with the given width. With the -n flag it should eliminate all flat cells within the stream, so when and if the water gets into the stream it will flow. The points option generates x,y,z for points which define the stream with the z-value of the bottom of the carved-in stream. These points can then be combined with contours to interpolate a new DEM with better representation of valleys.NOTE
r.carve does not create a depressionless DEM because many depressions are in flat areas and not in the streams.EXAMPLE
g.region rast=elevation.10m -p
r.carve rast=elevation.10m vect=streams out=carve_dem width=20 depth=5
BUGS
The module does not operate yet in latitude-longitude locations. It has not been thoroughly tested, so not all options may work properly - but this was the intention.REFERENCES
Terrain modeling and Soil Erosion Simulations for Fort Hood and Fort Polk test areas, by Helena Mitasova, Lubos Mitas, William M. Brown, Douglas M. Johnston, GMSL (Report for CERL 1999)SEE ALSO
r.flow, r.fill.dir, r.watershedAUTHOR
Bill Brown (GMSL)GRASS 6 update: Brad Douglas
Last changed: $Date: 2008-01-13 02:01:00 +0100 (Sun, 13 Jan 2008) $
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