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v.to.3d.1grass
Langue: en
Version: 333303 (ubuntu - 24/10/10)
Section: 1 (Commandes utilisateur)
Sommaire
NAME
v.to.3d - Performs transformation of 2D vector features to 3D.KEYWORDS
vector, transformation, 3DSYNOPSIS
v.to.3dv.to.3d help
v.to.3d [-rt] input=name output=name [type=string[,string,...]] [height=float] [layer=integer] [column=name] [--overwrite] [--verbose] [--quiet]
Flags:
- -r
Reverse transformation; 3D vector features to 2D- -t
Do not copy table- --overwrite
Allow output files to overwrite existing files- --verbose
Verbose module output- --quiet
Quiet module output
Parameters:
- input=name
Name of input vector map- output=name
Name for output vector map- type=string[,string,...]
Feature type
Options: point,line,boundary,centroid
Default: point,line,boundary,centroid- height=float
Fixed height for 3D vector features- layer=integer
Layer number
A single vector map can be connected to multiple database tables. This number determines which table to use.
Default: 1- column=name
Name of attribute column used for height
Can be used for reverse transformation, to store height of points
DESCRIPTION
The v.to.3d module is used to transform 2D vector features to 3D. Height (z-coordinate) of 3D vector features can be specified by height parameter as fixed value or by column parameter.Flag -r enables to perform reverse transformation, i.e., transform 3D vector to 2D by omitting z-coordinate.
NOTES
When transforming 2D vector features to 3D based on attribute, all NULL values are silently converted to height 0.0.EXAMPLES
Transform 2D vector features to 3D
# convert z-values from string to double
v.db.addcol map=geodetic_pts columns="Z_VALUE_D double precision"
v.db.update map=geodetic_pts column=Z_VALUE_D qcolumn=Z_VALUE
v.db.select map=geodetic_pts columns=cat,Z_VALUE,Z_VALUE_
# convert 2D vector point map to 3D based on attribute
v.to.3d input=geodetic_pts out=geodetic_pts_3d column=Z_VALUE_D
Transform 3D vector features to 2D
v.to.3d -rt input=elev_lid792_bepts output=elev_lid_2d
SEE ALSO
v.transform, v.extrude, v.drapeAUTHORS
Martin Landa, CTU in Prague, Czech RepublicLast changed: $Date: 2009-01-10 00:39:21 +0100 (sab, 10 gen 2009) $
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