Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Contact Us
Online Help
Domain Status
Man Pages

Virtual Servers

Topology Map

Server Agreement
Year 2038

USA Flag



Man Pages Grass User's Manual - Performs transformation of 2D vector features to 3D.

vector, geometry, 3D --help [-rt] input=name [layer=string] [ type=string[,string,...]] output=name [column=name] [height=float] [-- overwrite] [--help] [--verbose] [-- quiet] [--ui]

Reverse transformation; 3D vector features to 2D
Do not copy attribute table
Allow output files to overwrite existing files
Print usage summary
Verbose module output
Quiet module output
Force launching GUI dialog

input=name [required]
Name of input vector map
Or data source for direct OGR access
Layer number or name (’-1’ for all layers)
A single vector map can be connected to multiple database tables. This number determines which table to use. When used with direct OGR access this is the layer name.
Default: 1
Input feature type
Options: point, line, boundary, centroid
Default: point,line,boundary,centroid
output=name [required]
Name for output vector map
Name of attribute column used for height
Can be used for reverse transformation, to store height of points
Fixed height for 3D vector features

The 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. Height of input 3D features can be optionally stored in column.

When transforming 2D vector features to 3D based on attribute, all NULL values are silently converted to height 0.0.
Reverse transformation is possible for points and lines. In case of lines, the reverse transformation should be used only when all vertices of a line have the same z-coordinate (for example contours).

# convert z-values from string to double
v.db.addcolumn map=geodetic_pts columns="Z_VALUE_D double precision"
v.db.update map=geodetic_pts column=Z_VALUE_D qcolumn=Z_VALUE map=geodetic_pts columns=cat,Z_VALUE,Z_VALUE_D
# convert 2D vector point map to 3D based on attribute input=geodetic_pts out=geodetic_pts_3d column=Z_VALUE_D -rt input=elev_lid792_bepts output=elev_lid_2d

v.transform, v.extrude, v.drape

Martin Landa, Czech Technical University in Prague, Czech Republic
Last changed: $Date: 2015-06-17 04:29:17 +0200 (Wed, 17 Jun 2015) $

Available at: source code (history)
Main index | Vector index | Topics index | Keywords index | Graphical index | Full index
© 2003-2018 GRASS Development Team, GRASS GIS 7.4.3 Reference Manual
GRASS 7.4.3

Search for    or go to Top of page |  Section 1 |  Main Index

Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with ManDoc.