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man page of v.extrude

v.extrude: Extrudes flat vector object to 3D with defined height.


v.extrude - Extrudes flat vector object to 3D with defined height.
vector, geometry, 3D
v.extrude v.extrude help v.extrude [-t] input=name output=name [zshift=float] [elevation=name] [height=float] [hcolumn=name] [type=string[,string,...]] [layer=integer] [--overwrite] [--verbose] [--quiet] Flags: -t Trace elevation --overwrite Allow output files to overwrite existing files --verbose Verbose module output --quiet Quiet module output Parameters: input=name Name of input 2D vector map output=name Name of resulting 3D vector map zshift=float Shifting value for z coordinates Default: 0 elevation=name Elevation raster for height extraction height=float Fixed height for 3D vector objects hcolumn=name Name of attribute column with object heights type=string[,string,...] Feature type Options: point,line,boundary,area Default: point,line,boundary,area layer=integer Layer number A single vector map can be connected to multiple database tables. This number determines which table to use. Default: 1


v.extrude creates faces, kernels, volumes or 3D lines based on 2D vector objects, i.e. points become 3D vertical lines, lines to 3D lines, boundaries to faces and areas to volumes (composition of faces and kernel). If the flag -t is used then 3D vector objects follow the elevation model by using individual elevation values for the vertices and nodes. This can be useful for models of large objects (forest stands).


3D houses with fixed height v.extrude input=houses output=houses3D height=5 type=area 3D houses with individual height v.extrude input=houses output=houses3D elevation=dem hcolumn=height type=area Convert 2D lines to 3D with fixed height v.extrude input=lines output=lines3D elevation=dem height=0 type=line




Jachym Cepicky, Updated by Martin Landa, FBK-irst, Italy Last changed: $Date: 2008-02-29 00:33:29 +0100 (Fri, 29 Feb 2008) $ Full index (C) 2003-2010 GRASS Development Team V.EXTRUDE(1)

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