NAME

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

KEYWORDS

       raster, conversion, raster3d, voxel

SYNOPSIS

       r.to.rast3elev
       r.to.rast3elev --help
       r.to.rast3elev    [-ulm]   input=name[,name,...]   elevation=name[,name,...]   output=name
       [upper=float]   [lower=float]   [tilesize=integer]   [--overwrite]  [--help]   [--verbose]
       [--quiet]  [--ui]

   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 3D raster mask (if exists) with input map

       --overwrite
           Allow output files to overwrite existing files

       --help
           Print usage summary

       --verbose
           Verbose module output

       --quiet
           Quiet module output

       --ui
           Force launching GUI dialog

   Parameters:
       input=name[,name,...] [required]
           Name of input raster map(s)

       elevation=name[,name,...] [required]
           Name of input elevation raster map(s)

       output=name [required]
           Name for output 3D raster 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

       tilesize=integer
           The maximum tile size in kilo bytes. Default is 32KB.
           Default: 32

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 sample data set example
       g.region raster=elevation.10m -p
       g.region res=200 res3=200 t=2000 b=0 tbres=20 -p
       # Write the values of raster map soils based on the elevation of elevation.10m
       # to the 3D map volev
       r.to.rast3elev 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 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 in=soils elev=elevation.10m out=volev_u -u
       # Example with multiple elevation maps.
       ## first we need three support maps
       r.mapcalc expression="one = 1"
       r.mapcalc expression="two = 2"
       r.mapcalc expression="three = 3"
       ## Now we generate the new evelation maps
       r.mapcalc expression="elev_mid = elevation.10m - 500"
       r.mapcalc 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 -l input=one,two,three elevation=elevation.10m,elev_mid,elev_bottom output=threelayer
       ## Export the map for visualization with paraview (http://www.paraview.org)
       ## By default the null value is -9999.99, we adjust it to 0.0 for
       ## better visualization
       r3.out.vtk null=0.0 input=threelayer output=/tmp/threelayer.vtk
       # Start paraview
       paraview --data=/tmp/threelayer.vtk
       # Note: 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: 2014-12-19 22:55:37 +0100 (Fri, 19 Dec 2014) $

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