Vector commands

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GRASS GIS 6.0.2

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Vector commands


Testo originale inglese
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v.bufferCrea un buffer intorno features di un dato tipo (aree devono contenere un centroide).
v.build.allv.build.all
v.build Crea la topologia per i dati vettoriali GRASS.
v.build.polylinesCostruisce poligoni da linee.
v.categoryAttach, delete or report vector categories to map geometry.
v.cleanToolset to clean vector topology.
v.convert.all
v.convertImporta vecchie versioni dei vettori di GRASS.
v.db.connectprints/sets DB connection for a vector map
v.db.selectMostra gli attributi di un file vettoriale
v.delaunayCreate a Delaunay triangulation from an input vector of points or centroids.
v.digit
v.distanceFind the nearest element in vector 'to' for elements in vector 'from'. Various information about this relation may be uploaded to the attribute table of input vector 'from' or printed to stdout.
v.externalCreate a new vector as a read-only link to OGR layer. Available drivers:
v.extractSelects vector objects from an existing vector map and creates a new map containing only the selected objects. If 'list', 'file' and 'where' options are not specified, all features of given type and layer are extracted, categories are not changed in that case.
v.hullUses a GRASS vector points map to produce a convex hull vector map
v.in.asciiConvert GRASS ascii file or points file to binary vector.
v.in.dbCreate new vector (points) from database table containing coordinates.
v.in.e00Importa file E00 in una mappa vettoriale.
v.infoOutputs basic information about a user-specified vector map layer.
v.in.garminUpload Waypoints, Routes, e Tracks da un Garmin GPS ricevendoli in una mappa vettoriale.
v.in.ogrConverte vettori OGR in vettori GRASS. Driver disponibili:
v.in.regionCrea un nuovo vettore dalla regione corrente.
v.in.sites.all
v.in.sitesConverts a GRASS site_lists file into a vector file.
v.kcvRandomly partition points into test/train sets.
v.kernelGenerates a raster density map from vector points data using a moving 2D isotropic Gaussian kernel or optionally generates a vector density map on vector network with a 1D kernel
v.labelCreate paint labels for GRASS vector file and attached attributes.
v.mkgridCreates a (binary) GRASS vector map of a user-defined grid.
v.neighborsMakes each cell value a function of the attribute values assigned to the vector points or centroids around it, and stores new cell values in an output raster map layer.
v.net.allocAllocate subnets for nearest centres (direction from centre). Centre node must be opened (costs >= 0). Costs of centre node are used in calculation
v.netNetwork maintenance.
v.net.isoSplit net to bands between cost isolines (direction from centre). Centre node must be opened (costs >= 0). Costs of centre node are used in calculation
v.net.pathFind shortest path on vector network. Reads start/end pointsfrom standard input in 2 possible formats:
v.net.salesmanCreate a cycle connecting given nodes (Traveling salesman problem). Note that TSP is NP-hard, heuristic algorithm is used by this module and created cycle may be sub optimal.
v.net.steinerCreate Steiner tree for the network and given terminals. Note that 'Minimum Steiner Tree' problem is NP-hard and heuristic algorithm is used in this module so the the result may be sub optimal.
v.normaltests for normality for points.
v.out.asciiConvert a GRASS binary vector map to a GRASS ASCII vector map
v.out.dxfEsporta un file vettoriale di GRASS in un file di fomato DXF.
v.out.ogrConvert to OGR format.
v.out.povConvert to POV-Ray format, GRASS x,y,z -> POV-Ray x,z,y
v.overlayOverlay di due mappe vettoriali.
v.patchCreates a new binary vector map layer by combining other binary vector map layers.
v.perturbRandom location perturbations of GRASS sites.
v.projAllows projection conversion of vector files.
v.qcountindices for quadrat counts of sites lists
v.randomRandomly generate a GRASS vector points map.
v.reclassChanges vector category values for an existing vector map according to results of SQL queries or a value in attribute table column.
v.sampleSample a raster file at site locations.
v.segmentCreate points/segments from input lines, and positions read from stdin in format:
v.selectSelect features from ainput by features from binput.
v.surf.idwSurface interpolation from sites data by Inverse Distance Squared Weighting.
v.surf.rstInterpolation and topographic analysis from given point or contour data in vector format to GRASS floating point raster format using regularized spline with tension.
v.to.dbLoad values from vector to database. In uploaded/printed category values '-1' is used for 'no category' and 'null'/'-' if category cannot be found or multiple categories were found.
v.to.pointsCreate points along input lines.
v.to.rastConverts a binary GRASS vector map layer into a GRASS raster map layer.
v.transformTransforms an vector map layer from one coordinate system into another coordinate system.
v.typeChange the type of geometry elements.
v.univarCalculates univariate statistics for attribute. Variance and standard deviation is calculated only for points.
v.vol.rstInterpolates point data to a G3D grid volume using regularized spline with tension (RST) algorithm
v.voronoiCrea una triangolazione di Voronoi a partire da un vettoriale in input contenente punti o centroidi.
v.what.rastUpload raster values at positions of vector points to the table.
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