NAME¶
v.extrude - Extrudes flat vector object to 3D with defined height.
KEYWORDS¶
vector, geometry, 3D
SYNOPSIS¶
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
DESCRIPTION¶
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).
EXAMPLES¶
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
SEE ALSO¶
nviz
AUTHOR¶
Jachym Cepicky,
Updated by Martin Landa, FBK-irst, Italy
Last changed: $Date: 2008-02-29 00:33:29 +0100 (Fri, 29 Feb 2008) $
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