Vector modules - GRASS GIS 8.3.dev Reference Manual

GRASS GIS 8.3.dev Reference Manual

Geographic Resources Analysis Support System, commonly referred to as GRASS GIS, is a Geographic Information System (GIS) used for geospatial data management and analysis, image processing, graphics/maps production, spatial modeling, and visualization. GRASS is currently used in academic and commercial settings around the world, as well as by many governmental agencies and environmental consulting companies.

This reference manual details the use of modules distributed with Geographic Resources Analysis Support System (GRASS), an open source (GNU GPLed), image processing and geographic information system (GIS).

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Vector commands:

v.build.all	Rebuilds topology on all vector maps in the current mapset.
v.centroids	Adds missing centroids to closed boundaries.
v.clip	Extracts features of input map which overlay features of clip map.
v.db.addcolumn	Adds one or more columns to the attribute table connected to a given vector map.
v.db.addtable	Creates and connects a new attribute table to a given layer of an existing vector map.
v.db.dropcolumn	Drops a column from the attribute table connected to a given vector map.
v.db.droprow	Removes a vector feature from a vector map through attribute selection.
v.db.droptable	Removes existing attribute table of a vector map.
v.db.join	Joins a database table to a vector map table.
v.db.reconnect.all	Reconnects attribute tables for all vector maps from the current mapset to a new database.
v.db.renamecolumn	Renames a column in the attribute table connected to a given vector map.
v.db.univar	Calculates univariate statistics on selected table column for a GRASS vector map.
v.db.update	Updates a column in the attribute table connected to a vector map.
v.dissolve	Dissolves boundaries between adjacent areas sharing a common category number or attribute.
v.external.out	Defines vector output format.
v.import	Imports vector data into a GRASS vector map using OGR library and reprojects on the fly.
v.in.e00	Imports E00 file into a vector map.
v.in.geonames	Imports geonames.org country files into a vector points map.
v.in.lines	Imports ASCII x,y[,z] coordinates as a series of lines.
v.in.mapgen	Imports Mapgen or Matlab-ASCII vector maps into GRASS.
v.in.wfs	Imports GetFeature from a WFS server.
v.pack	Exports a vector map as GRASS GIS specific archive file
v.rast.stats	Calculates univariate statistics from a raster map based on a vector map and uploads statistics to new attribute columns.
v.report	Reports geometry statistics for vector maps.
v.timestamp	Modifies a timestamp for a vector map.
v.to.lines	Converts vector polygons or points to lines.
v.unpack	Imports a GRASS GIS specific vector archive file (packed with v.pack) as a vector map
v.what.strds	Uploads space time raster dataset values at positions of vector points to the table.
v.what.vect	Uploads vector values at positions of vector points to the table.

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