Topic: geometry

       i.image.mosaic                                               Mosaics several images and extends colormap.

       r.patch                                                      Creates a composite raster map layer by using known category
                                                                    values from one (or more) map layer(s) to fill in  areas  of
                                                                    "no data" in another map layer.

       r.thin                                                       Thins non-null cells that denote linear features in a raster
                                                                    map layer.

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

       v.drape                                                      Converts  2D  vector features to 3D by sampling of elevation
                                                                    raster map.

       v.edit                                                       Edits a vector map, allows adding,  deleting  and  modifying
                                                                    selected vector features.

       v.extrude                                                    Extrudes  flat  vector  features  to 3D vector features with
                                                                    defined height.

       v.hull                                                       Produces a 2D/3D convex hull for a given vector map.

       v.in.region                                                  Creates a vector polygon from the current region extent.

       v.mkgrid                                                     Creates a vector map of a user-defined grid.

       v.overlay                                                    Overlays  two  vector  maps  offering  clip,   intersection,
                                                                    difference, symmetrical difference, union operators.

       v.parallel                                                   Creates parallel line to input vector lines.

       v.patch                                                      Creates a new vector map by combining other vector maps.

       v.perturb                                                    Random location perturbations of vector points.

       v.report                                                     Reports geometry statistics for vector maps.

       v.segment                                                    Creates   points/segments   from   input  vector  lines  and
                                                                    positions.

       v.select                                                     Selects features from vector map (A) by features from  other
                                                                    vector map (B).

       v.split                                                      Splits vector lines to shorter segments.

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

       v.to.lines                                                   Converts vector polygons or points to lines.

       v.to.points                                                  Creates  points  along  input lines in new vector map with 2
                                                                    layers.

       v.type                                                       Changes type of vector features.

       v.voronoi                                                    Creates a Voronoi diagram constrained to the extents of  the
                                                                    current region from an input vector map containing points or
                                                                    centroids.

       See also the corresponding keyword geometry for additional references.

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