bionic (1) v.delaunay.1grass.gz

NAME

       v.delaunay  - Creates a Delaunay triangulation from an input vector map containing points or centroids.

KEYWORDS

       vector, geometry, triangulation

SYNOPSIS

       v.delaunay
       v.delaunay --help
       v.delaunay [-rl] input=name  [layer=string]  output=name  [--overwrite]  [--help]  [--verbose]  [--quiet]
       [--ui]

   Flags:
       -r
           Use only points in current region

       -l
           Output triangulation as a graph (lines), not areas

       --overwrite
           Allow output files to overwrite existing files

       --help
           Print usage summary

       --verbose
           Verbose module output

       --quiet
           Quiet module output

       --ui
           Force launching GUI dialog

   Parameters:
       input=name [required]
           Name of input vector map
           Or data source for direct OGR access

       layer=string
           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

       output=name [required]
           Name for output vector map

DESCRIPTION

       v.delaunay  uses  an  existing  vector  points  map (input) to create a Delaunay triangulation vector map
       (output).

       Delaunay triangulation example (red-yellow points are the data points from which  the  triangulation  was
       generated):

EXAMPLE

       Commands used with the North Carolina dataset to create the above figure (subset shown in figure).
       g.region n=220750 s=219950 w=638300 e=639000 -p
       v.delaunay input=elev_lid792_randpts output=elev_lid792_randpts_delaunay

REFERENCES

       Leonid  Guibas  and Jorge Stolfi, (1985). Primitives for the Manipulation of General Subdivisions and the
       Computation of Voronoi Diagrams, ACM Transactions on Graphics, Vol 4, No. 2, April 1985, Pages 74-123

SEE ALSO

        v.voronoi, v.hull

AUTHORS

       Martin Pavlovsky, Google Summer of Code 2008, Student
       Paul Kelly, Mentor
       Based on "dct" by Geoff Leach, Department of Computer Science, RMIT.

       Last changed: $Date: 2015-08-10 15:56:03 +0200 (Mon, 10 Aug 2015) $

SOURCE CODE

       Available at: v.delaunay source code (history)

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       © 2003-2018 GRASS Development Team, GRASS GIS 7.4.0 Reference Manual