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r.to.rast3elev

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r.to.rast3elev: Creates a 3D volume map based on 2D elevation and value raster maps.

NAME

r.to.rast3elev - Creates a 3D volume map based on 2D elevation and value raster maps.

KEYWORDS

raster, raster3d, voxel, conversion

SYNOPSIS

r.to.rast3elev r.to.rast3elev help r.to.rast3elev [-ulm] input=name[,name,...] elevation=name[,name,...] output=name [upper=float] [lower=float] [--overwrite] [--verbose] [--quiet] Flags: -u Use the input map values to fill the upper cells -l Use the input map values to fill the lower cells -m Use G3D mask (if exists) with input map --overwrite Allow output files to overwrite existing files --verbose Verbose module output --quiet Quiet module output Parameters: input=name[,name,...] Name of input raster map(s) elevation=name[,name,...] Name of elevation raster map(s) output=name Name for output raster3d map upper=float The value to fill the upper cells, default is null lower=float The value to fill the lower cells, default is null
DESCRIPTION
Creates a 3D volume map based on 2D elevation and value raster maps. If the 2d and 3d region settings are different, the 2d resolution will be adjust to the 3d resolution. | How r.to.rast3elev works
NOTES
The hight of the 2D elevation maps will be used to verify the position within the 3D region. If the cell value of the elevation raster maps is located within the 3d region, the cell value of the appropriate 2D input raster maps will be written to the associated 3d cell. There are flags and options to fill the upper and lower 3D cells with a specific value, or the input raster maps values.

EXAMPLE

Simple Spearfish example g.region rast=elevation.10m g.region res=200 res3=200 t=2000 b=0 tbres=20 # Write the values of raster map soils based on the elevation of elevation.10m # to the 3D map volev r.to.rast3elev --o in=soils elev=elevation.10m out=volev # Write the values of map soils based on the elevation of elevation.10m # to the 3D map volev_l and fill the lower cells with the soils map values r.to.rast3elev --o in=soils elev=elevation.10m out=volev_l -l # Write the values of map soils based on the elevation of elevation.10m # to the 3D map volev_u and fill the upper cells with the soils map values r.to.rast3elev --o in=soils elev=elevation.10m out=volev_u -u # Example with multiple elevation maps. ## first we need three support maps r.mapcalc --o expression="one = 1" r.mapcalc --o expression="two = 2" r.mapcalc --o expression="three = 3" ## Now we generate the new evelation maps r.mapcalc --o expression="elev_mid = elevation.10m - 500" r.mapcalc --o expression="elev_bottom = elevation.10m - 1000" ## Now fill the lower cells below the elevation maps with the values one, two and three r.to.rast3elev --o -l input=one,two,three elevation=elevation.10m,elev_mid,elev_bottom output=threelayer ## Export the map for visualization with paraview (//www.paraview.org) ## By default the null value is -9999.99, we adjust it to 0.0 for ## better visualization r3.out.vtk --o null=0.0 input=threelayer output=/tmp/threelayer.vtk # Start paraview paraview --data=/tmp/threelayer.vtk # First you need to choose the surface representation style and then color by "threelayer" in paraview .

SEE ALSO

r.to.rast3 r3.cross.rast g.region

AUTHOR

Soeren Gebbert Last changed: $Date: 2011-02-22 08:49:31 +0100 (Tue, 22 Feb 2011) $ Full index (C) 2003-2010 GRASS Development Team R.TO.RAST3ELEV(1)
 
 
 

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