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v.to.3d

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v.to.3d: Performs transformation of 2D vector features to 3D.

NAME

v.to.3d - Performs transformation of 2D vector features to 3D.

KEYWORDS

vector, transformation, 3D

SYNOPSIS

v.to.3d v.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.drape

AUTHORS

Martin Landa, CTU in Prague, Czech Republic Last changed: $Date: 2009-01-10 00:39:21 +0100 (Sat, 10 Jan 2009) $ Full index (C) 2003-2010 GRASS Development Team V.TO.3D(1)
 
 
 

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