NAME
v.type - Changes type of vector features.
KEYWORDS
vector,
geometry,
editing,
area,
line,
point
SYNOPSIS
v.type
v.type --help
v.type input=name [layer=string] output=name from_type=string to_type=string [--overwrite] [--help] [--verbose] [--quiet] [--ui]
Flags:
- --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
- from_type=string [required]
- Feature type to convert from
- Options: point, line, boundary, centroid, face, kernel
- Default: line
- to_type=string [required]
- Feature type to convert to
- Options: point, line, boundary, centroid, face, kernel
- Default: boundary
v.type changes the type of geometry primitives.
The following vector object types are defined in GRASS GIS:
- point: a point;
- line: a directed sequence of connected vertices with two endpoints called nodes;
- boundary: the border line describing an area;
- centroid: a point within a closed ring of boundaries;
- area: the topological composition of a closed ring of boundaries and a centroid;
- face: a 3D area;
- kernel: a 3D centroid in a volume (not yet implemented);
- volume: a 3D corpus, the topological composition of faces and kernel (not yet implemented).
Lines and boundaries can be composed of multiple vertices.
Area topology also holds information about isles. These isles are located
within that area, not touching the boundaries of the outer area. Isles
are holes inside the area, and can consist of one or more areas. They are
used internally to maintain correct topology for areas.
Convert lines to area boundaries
v.type input=map_l output=map_b from_type=line to_type=boundary
In order to create areas, centroids must be added with
v.centroids.
v.centroids,
v.to.points
Radim Blazek, ITC-Irst, Trento, Italy
SOURCE CODE
Available at:
v.type source code
(history)
Latest change: Thursday Oct 10 20:41:09 2024 in commit: def7a1af728ed34f459f5fe474fab4657f5d277e
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© 2003-2024
GRASS Development Team,
GRASS GIS 8.4.1dev Reference Manual