NAME
r.carve - Takes vector stream data, transforms it to raster, and subtracts depth from the output DEM
KEYWORDS
raster
SYNOPSIS
r.carve
r.carve help
r.carve [-qn] rast=name vect=name output=name [points=name] [width=float] [depth=float] [--overwrite]
Flags:
- -q
- Quiet - Do not show progress
- -n
- No flat areas allowed in flow direction
- --overwrite
- Force overwrite of output files
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 of 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 takes vector stream data, transforms it to raster, and
subtracts depth from the output DEM.
The program will take the vector stream data, transform them to
raster, and subtracts a defaultdepth+additionaldepth from the DEM. If
the given width is more than 1 cell it will carve the stream with the
given width. With -n option it should eliminate all flat cells within
the stream, so when and if the water gets into the stream it will
flow. Site option generates x,y,z for points which define the stream
with the z value of the bottom of the carved-in stream. These sites
can then be combined with contour sites to interpolate a new DEM with
better representation of valleys.
NOTES
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 AND CAVEAT
The module does not operate yet in latitude-longitude locations. It
has not been thoroughly tested so not all option may work properly -
but this was the intention.
SEE ALSO
r.flow,
r.fill.dir,
r.watershed
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)
AUTHOR
Bill Brown (GMSL)
Last changed: $Date: 2006/06/01 10:19:42 $
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