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 © 2003-2014 GRASS Development Team