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NAME

v.out.vtk - Convert a GRASS binary vector map to VTK ASCII output

SYNOPSIS

v.out.vtk
v.out.vtk help
v.out.vtk input=name [output=string] [feature=string] [dp=integer] [layer=integer]

Parameters:

input=name
Name of input vector map
output=string
Path to resulting VTK file.
feature=string
Feature that will be exported
Options: point,kernel,centroid,line,boundary,area,face
Default: line
dp=integer
Number of significant digits (floating point only)
layer=integer
Layer number
Default: 1

DESCRIPTION

v.out.vtk converts a GRASS vector map in binary format to the VTK ASCII output.

If the output parameter is not given, the output will be send to stdout.

NOTES

Only one feature can be exported at a time, available features are: Categorie data (cat) for the selected feature and layer will be written as scalar data with name "cat". If no cat exists, the value will set to -1 as normal cat's are always positive. If a feature has more categories in one layer, only the first category will be exported.

3d vectors are supported by default. The created VTK data always includes x, y and z coordinates. If no elevation is available for the choosen feature, 0 will be set as z coordinate. You can easily convert your 2d vectors into 3d vectors with v.drape.

The GRASS vector data is converted into the polydata format of VTK:

The data can be visualized VTK Toolkit, Paraview and MayaVi which are based on VTK.

Attention

If areas or faces are exported, the data have to be triangulated within Paraview or MayaVi!

EXAMPLE

Spearfish example:

Export the soils with cats in layer 1:

v.out.vtk input=soils feature=area layer=1 output=/tmp/soils.vtk
Export the streams with cats in layer 1:
v.out.vtk input=streams feature=line layer=1 output=/tmp/streams.vtk
Write the archsite vtk outpout to stdout with cats in layer 1:
v.out.vtk input=archsites feature=point layer=1

SEE ALSO

v.out.ascii
r.out.vtk
r3.out.vtk

AUTHORS

Soeren Gebbert

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