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GRASS GIS 7.2.3 Reference Manual

Geographic Resources Analysis Support System, commonly referred to as GRASS, 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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Table of contents

Display commands (d.*)

d.barscale Displays a barscale on the graphics monitor.
d.colorlist Outputs a list of all available display colors.
d.colortable Displays the color table associated with a raster map layer.
d.erase Erases the contents of the active graphics display frame with user defined color.
d.font Selects the font in which text will be displayed on the user's graphics monitor.
d.fontlist Lists the available fonts.
d.geodesic Displays a geodesic line, tracing the shortest distance between two geographic points along a great circle, in a longitude/latitude data set.
d.graph Program for generating and displaying simple graphics on the display monitor.
d.grid Overlays a user-specified grid in the active display frame on the graphics monitor.
d.his Displays the result obtained by combining hue, intensity, and saturation (HIS) values from user-specified input raster map layers.
d.histogram Displays a histogram in the form of a pie or bar chart for a user-specified raster map.
d.info Displays information about the active display monitor.
d.labels Displays text labels (created with v.label) to the active frame on the graphics monitor.
d.legend Displays a legend for a 2D or 3D raster map in the active frame of the graphics monitor.
d.legend.vect Displays a vector legend in the active graphics frame.
d.linegraph Generates and displays simple line graphs in the active graphics monitor display frame.
d.mon Controls graphics display monitors from the command line.
d.northarrow Displays a north arrow on the graphics monitor.
d.path Finds shortest path for selected starting and ending node.
d.profile Plots profile of a transect.
d.rast.arrow Draws arrows representing cell aspect direction for a raster map containing aspect data.
d.rast Displays user-specified raster map in the active graphics frame.
d.rast.num Overlays cell category values on a raster map displayed in the active graphics frame.
d.rgb Displays three user-specified raster maps as red, green, and blue overlays in the active graphics frame.
d.rhumbline Displays the rhumbline joining two longitude/latitude coordinates.
d.text Draws text in the active display frame on the graphics monitor using the current font.
d.title Create a TITLE for a raster map in a form suitable for display with d.text.
d.vect.chart Displays charts of vector data in the active frame on the graphics monitor.
d.vect Displays user-specified vector map in the active graphics frame.
d.vect.thematic Displays a thematic vector map in the active graphics frame.
d.where Identifies the geographic coordinates associated with point locations given in display coordinates.

Database commands (db.*)

db.columns List all columns for a given table.
db.connect Prints/sets general DB connection for current mapset.
db.copy Copy a table.
db.createdb Creates an empty database.
db.databases Lists all databases for a given driver and location.
db.describe Describes a table in detail.
db.drivers Lists all database drivers.
db.dropdb Removes an existing database.
db.execute Executes any SQL statement.
db.login Sets user/password for DB driver/database.
db.select Selects data from attribute table.
db.tables Lists all tables for a given database.

General commands (g.*)

g.access Controls access to the current mapset for other users on the system.
g.cairocomp Overlays multiple X Pixmaps.
g.copy Copies available data files in the current mapset search path to the user's current mapset.
g.dirseps Internal GRASS utility for converting directory separator characters.
g.filename Prints GRASS data base file names.
g.findetc Searches for GRASS support files.
g.findfile Searches for GRASS data base files and sets variables for the shell.
g.gisenv Outputs and modifies the user's current GRASS variable settings.
g.gui Launches a GRASS graphical user interface (GUI) session.
g.list Lists available GRASS data base files of the user-specified data type optionally using the search pattern.
g.mapset Changes/reports current mapset.
g.mapsets Modifies/prints the user's current mapset search path.
g.message Prints a message, warning, progress info, or fatal error in the GRASS way.
g.mkfontcap Generates the font configuration file by scanning various directories for fonts.
g.parser Provides automated parser, GUI, and help support for GRASS scipts.
g.pnmcomp Overlays multiple PPM image files.
g.ppmtopng Converts between PPM/PGM and PNG image formats.
g.proj Prints or modifies GRASS projection information files (in various co-ordinate system descriptions).
g.region Manages the boundary definitions for the geographic region.
g.remove Removes data base element files from the user's current mapset using the search pattern.
g.rename Renames data base element files in the user's current mapset.
g.tempfile Creates a temporary file and prints it's file name.
g.version Displays GRASS GIS version info.

Imagery commands (i.*)

i.albedo Computes broad band albedo from surface reflectance.
i.aster.toar Calculates Top of Atmosphere Radiance/Reflectance/Brightness Temperature from ASTER DN.
i.atcorr Performs atmospheric correction using the 6S algorithm.
i.biomass Computes biomass growth, precursor of crop yield calculation.
i.cca Canonical components analysis (CCA) program for image processing.
i.cluster Generates spectral signatures for land cover types in an image using a clustering algorithm.
i.eb.eta Actual evapotranspiration for diurnal period (Bastiaanssen, 1995).
i.eb.evapfr Computes evaporative fraction and root zone soil moisture.
i.eb.hsebal01 Computes sensible heat flux iteration SEBAL 01.
i.eb.netrad Net radiation approximation (Bastiaanssen, 1995).
i.eb.soilheatflux Soil heat flux approximation (Bastiaanssen, 1995).
i.emissivity Computes emissivity from NDVI, generic method for sparse land.
i.evapo.mh Computes evapotranspiration calculation modified or original Hargreaves formulation, 2001.
i.evapo.pm Computes potential evapotranspiration calculation with hourly Penman-Monteith.
i.evapo.pt Computes evapotranspiration calculation Priestley and Taylor formulation, 1972.
i.evapo.time Computes temporal integration of satellite ET actual (ETa) following the daily ET reference (ETo) from meteorological station(s).
i.fft Fast Fourier Transform (FFT) for image processing.
i.gensig Generates statistics for i.maxlik from raster map.
i.gensigset Generates statistics for i.smap from raster map.
i.group Creates, edits, and lists groups of imagery data.
i.his.rgb Transforms raster maps from HIS (Hue-Intensity-Saturation) color space to RGB (Red-Green-Blue) color space.
i.ifft Inverse Fast Fourier Transform (IFFT) for image processing.
i.landsat.acca Performs Landsat TM/ETM+ Automatic Cloud Cover Assessment (ACCA).
i.landsat.toar Calculates top-of-atmosphere radiance or reflectance and temperature for Landsat MSS/TM/ETM+/OLI
i.maxlik Classifies the cell spectral reflectances in imagery data.
i.modis.qc Extracts quality control parameters from MODIS QC layers.
i.ortho.camera Select and modify the imagery group camera reference file.
i.ortho.elev Select or modify the target elevation model.
i.ortho.rectify Orthorectifies an image by using the image to photo coordinate transformation matrix.
i.pca Principal components analysis (PCA) for image processing.
i.rectify Rectifies an image by computing a coordinate transformation for each pixel in the image based on the control points.
i.rgb.his Transforms raster maps from RGB (Red-Green-Blue) color space to HIS (Hue-Intensity-Saturation) color space.
i.segment Identifies segments (objects) from imagery data.
i.smap Performs contextual image classification using sequential maximum a posteriori (SMAP) estimation.
i.target Targets an imagery group to a GRASS location and mapset.
i.topo.corr Computes topographic correction of reflectance.
i.vi Calculates different types of vegetation indices.
i.zc Zero-crossing "edge detection" raster function for image processing.

Miscellaneous commands (m.*)

m.cogo A simple utility for converting bearing and distance measurements to coordinates and vice versa.
m.measure Measures the lengths and areas of features.
m.nviz.image Creates a 3D rendering of GIS data.
m.nviz.script Creates fly-through script to run in NVIZ.
m.transform Computes a coordinate transformation based on the control points.

PostScript commands (ps.*)

ps.map Produces hardcopy PostScript map output.

Raster commands (r.*)

r.basins.fill Generates watershed subbasins raster map.
r.buffer Creates a raster map showing buffer zones surrounding cells that contain non-NULL category values.
r.carve Generates stream channels.
r.category Manages category values and labels associated with user-specified raster map layers.
r.circle Creates a raster map containing concentric rings around a given point.
r.clump Recategorizes data in a raster map by grouping cells that form physically discrete areas into unique categories.
r.coin Tabulates the mutual occurrence (coincidence) of categories for two raster map layers.
r.colors Creates/modifies the color table associated with a raster map.
r.colors.out Exports the color table associated with a raster map.
r.composite Combines red, green and blue raster maps into a single composite raster map.
r.compress Compresses and decompresses raster maps.
r.contour Produces a vector map of specified contours from a raster map.
r.cost Creates a raster map showing the cumulative cost of moving between different geographic locations on an input raster map whose cell category values represent cost.
r.covar Outputs a covariance/correlation matrix for user-specified raster map layer(s).
r.cross Creates a cross product of the category values from multiple raster map layers.
r.describe Prints terse list of category values found in a raster map layer.
r.distance Locates the closest points between objects in two raster maps.
r.drain Traces a flow through an elevation model or cost surface on a raster map.
r.external Links GDAL supported raster data as a pseudo GRASS raster map.
r.external.out Redirects raster output to file utilizing GDAL library rather than storing in GRASS raster format.
r.fill.dir Filters and generates a depressionless elevation map and a flow direction map from a given elevation raster map.
r.flow Constructs flowlines.
r.grow.distance Generates a raster map containing distances to nearest raster features.
r.gwflow Numerical calculation program for transient, confined and unconfined groundwater flow in two dimensions.
r.his Generates red, green and blue (RGB) raster map layers combining hue, intensity and saturation (HIS) values from user-specified input raster map layers.
r.horizon Computes horizon angle height from a digital elevation model.
r.in.ascii Converts a GRASS ASCII raster file to binary raster map.
r.in.bin Import a binary raster file into a GRASS raster map layer.
r.in.gdal Imports raster data into a GRASS raster map using GDAL library.
r.in.gridatb Imports GRIDATB.FOR map file (TOPMODEL) into a GRASS raster map.
r.in.mat Imports a binary MAT-File(v4) to a GRASS raster.
r.in.png Imports non-georeferenced PNG format image.
r.in.poly Creates raster maps from ASCII polygon/line/point data files.
r.in.xyz Creates a raster map from an assemblage of many coordinates using univariate statistics.
r.info Outputs basic information about a raster map.
r.kappa Calculates error matrix and kappa parameter for accuracy assessment of classification result.
r.lake Fills lake at given point to given level.
r.latlong Creates a latitude/longitude raster map.
r.li.cwed Calculates contrast weighted edge density index on a raster map
r.li.daemon Support module for r.li landscape index calculations.
r.li.dominance Calculates dominance's diversity index on a raster map
r.li.edgedensity Calculates edge density index on a raster map, using a 4 neighbour algorithm
r.li Toolset for multiscale analysis of landscape structure
r.li.mpa Calculates mean pixel attribute index on a raster map
r.li.mps Calculates mean patch size index on a raster map, using a 4 neighbour algorithm
r.li.padcv Calculates coefficient of variation of patch area on a raster map
r.li.padrange Calculates range of patch area size on a raster map
r.li.padsd Calculates standard deviation of patch area a raster map
r.li.patchdensity Calculates patch density index on a raster map, using a 4 neighbour algorithm
r.li.patchnum Calculates patch number index on a raster map, using a 4 neighbour algorithm.
r.li.pielou Calculates Pielou's diversity index on a raster map
r.li.renyi Calculates Renyi's diversity index on a raster map
r.li.richness Calculates richness index on a raster map
r.li.shannon Calculates Shannon's diversity index on a raster map
r.li.shape Calculates shape index on a raster map
r.li.simpson Calculates Simpson's diversity index on a raster map
r.mapcalc Raster map calculator.
r.mfilter Performs raster map matrix filter.
r.mode Finds the mode of values in a cover map within areas assigned the same category value in a user-specified base map.
r.neighbors Makes each cell category value a function of the category values assigned to the cells around it, and stores new cell values in an output raster map layer.
r.null Manages NULL-values of given raster map.
r.out.ascii Converts a raster map layer into a GRASS ASCII text file.
r.out.bin Exports a GRASS raster to a binary array.
r.out.gdal Exports GRASS raster maps into GDAL supported formats.
r.out.gridatb Exports GRASS raster map to GRIDATB.FOR map file (TOPMODEL).
r.out.mat Exports a GRASS raster to a binary MAT-File.
r.out.mpeg Converts raster map series to MPEG movie.
r.out.png Export a GRASS raster map as a non-georeferenced PNG image.
r.out.pov Converts a raster map layer into a height-field file for POV-Ray.
r.out.ppm Converts a GRASS raster map to a PPM image file.
r.out.ppm3 Converts 3 GRASS raster layers (R,G,B) to a PPM image file.
r.out.vrml Exports a raster map to the Virtual Reality Modeling Language (VRML).
r.out.vtk Converts raster maps into the VTK-ASCII format.
r.param.scale Extracts terrain parameters from a DEM.
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.profile Outputs the raster map layer values lying on user-defined line(s).
r.proj Re-projects a raster map from given location to the current location.
r.quant Produces the quantization file for a floating-point map.
r.quantile Compute quantiles using two passes.
r.random.cells Generates random cell values with spatial dependence.
r.random Creates a raster map layer and vector point map containing randomly located points.
r.random.surface Generates random surface(s) with spatial dependence.
r.reclass Reclassify raster map based on category values.
r.recode Recodes categorical raster maps.
r.region Sets the boundary definitions for a raster map.
r.regression.line Calculates linear regression from two raster maps: y = a + b*x.
r.regression.multi Calculates multiple linear regression from raster maps.
r.relief Creates shaded relief map from an elevation map (DEM).
r.report Reports statistics for raster maps.
r.resamp.bspline Performs bilinear or bicubic spline interpolation with Tykhonov regularization.
r.resamp.filter Resamples raster map layers using an analytic kernel.
r.resamp.interp Resamples raster map to a finer grid using interpolation.
r.resamp.rst Reinterpolates and optionally computes topographic analysis from input raster map to a new raster map (possibly with different resolution) using regularized spline with tension and smoothing.
r.resamp.stats Resamples raster map layers to a coarser grid using aggregation.
r.resample GRASS raster map layer data resampling capability.
r.rescale.eq Rescales histogram equalized the range of category values in a raster map layer.
r.rescale Rescales the range of category values in a raster map layer.
r.ros Generates rate of spread raster maps.
r.series.accumulate Makes each output cell value a accumulationfunction of the values assigned to the corresponding cells in the input raster map layers.
r.series Makes each output cell value a function of the values assigned to the corresponding cells in the input raster map layers.
r.series.interp Interpolates raster maps located (temporal or spatial) in between input raster maps at specific sampling positions.
r.sim.sediment Sediment transport and erosion/deposition simulation using path sampling method (SIMWE).
r.sim.water Overland flow hydrologic simulation using path sampling method (SIMWE).
r.slope.aspect Generates raster maps of slope, aspect, curvatures and partial derivatives from an elevation raster map.
r.solute.transport Numerical calculation program for transient, confined and unconfined solute transport in two dimensions
r.spread Simulates elliptically anisotropic spread.
r.spreadpath Recursively traces the least cost path backwards to cells from which the cumulative cost was determined.
r.statistics Calculates category or object oriented statistics.
r.stats Generates area statistics for raster map.
r.stats.quantile Compute category quantiles using two passes.
r.stats.zonal Calculates category or object oriented statistics (accumulator-based statistics).
r.stream.extract Performs stream network extraction.
r.sun Solar irradiance and irradiation model.
r.sunhours Calculates solar elevation, solar azimuth, and sun hours.
r.sunmask Calculates cast shadow areas from sun position and elevation raster map.
r.support Allows creation and/or modification of raster map layer support files.
r.support.stats Update raster map statistics
r.surf.area Prints estimation of surface area for raster map.
r.surf.contour Generates surface raster map from rasterized contours.
r.surf.fractal Creates a fractal surface of a given fractal dimension.
r.surf.gauss Generates a raster map using gaussian random number generator.
r.surf.idw Provides surface interpolation from raster point data by Inverse Distance Squared Weighting.
r.surf.random Produces a raster surface map of uniform random deviates with defined range.
r.terraflow Performs flow computation for massive grids.
r.texture Generate images with textural features from a raster map.
r.thin Thins non-null cells that denote linear features in a raster map layer.
r.tile Splits a raster map into tiles.
r.timestamp Modifies a timestamp for a raster map.
r.to.rast3 Converts 2D raster map slices to one 3D raster volume map.
r.to.rast3elev Creates a 3D volume map based on 2D elevation and value raster maps.
r.to.vect Converts a raster map into a vector map.
r.topidx Creates a topographic index (wetness index) raster map from an elevation raster map.
r.topmodel Simulates TOPMODEL which is a physically based hydrologic model.
r.transect Outputs raster map layer values lying along user defined transect line(s).
r.univar Calculates univariate statistics from the non-null cells of a raster map.
r.uslek Computes USLE Soil Erodibility Factor (K).
r.usler Computes USLE R factor, Rainfall erosivity index.
r.viewshed Computes the viewshed of a point on an elevation raster map.
r.volume Calculates the volume of data "clumps".
r.walk Creates a raster map showing the anisotropic cumulative cost of moving between different geographic locations on an input raster map whose cell category values represent cost.
r.water.outlet Creates watershed basins from a drainage direction map.
r.watershed Calculates hydrological parameters and RUSLE factors.
r.what.color Queries colors for a raster map layer.
r.what Queries raster maps on their category values and category labels.

3d raster commands (r3.*)

r3.colors Creates/modifies the color table associated with a 3D raster map.
r3.colors.out Exports the color table associated with a 3D raster map.
r3.cross.rast Creates cross section 2D raster map from 3D raster map based on 2D elevation map
r3.flow Computes 3D flow lines and 3D flow accumulation.
r3.gradient Computes gradient of a 3D raster map and outputs gradient components as three 3D raster maps.
r3.gwflow Numerical calculation program for transient, confined groundwater flow in three dimensions.
r3.in.ascii Converts a 3D ASCII raster text file into a (binary) 3D raster map.
r3.in.bin Imports a binary raster file into a GRASS 3D raster map.
r3.in.v5d Import 3-dimensional Vis5D files.
r3.info Outputs basic information about a user-specified 3D raster map layer.
r3.mapcalc Raster map calculator.
r3.mask Establishes the current working 3D raster mask.
r3.mkdspf Creates a display file from an existing 3D raster map according to specified threshold levels.
r3.neighbors Makes each voxel value a function of the values assigned to the voxels around it, and stores new voxel values in an output 3D raster map
r3.null Explicitly create the 3D NULL-value bitmap file.
r3.out.ascii Converts a 3D raster map layer into a ASCII text file.
r3.out.bin Exports a GRASS 3D raster map to a binary array.
r3.out.v5d Exports GRASS 3D raster map to 3-dimensional Vis5D file.
r3.out.vtk Converts 3D raster maps into the VTK-ASCII format.
r3.retile Retiles an existing 3D raster map with user defined x, y and z tile size.
r3.stats Generates volume statistics for 3D raster maps.
r3.support Allows creation and/or modification of 3D raster map layer support files.
r3.timestamp Modifies a timestamp for a 3D raster map.
r3.to.rast Converts 3D raster maps to 2D raster maps
r3.univar Calculates univariate statistics from the non-null cells of a 3D raster map.

Temporal commands (t.*)

t.connect Prints/sets general temporal GIS database connection for current mapset.

Test commands (test.*)

test.r3flow Testing flow lines.
test.raster3d.lib Performs unit and integration tests for the raster3d library

Vector commands (v.*)

v.buffer Creates a buffer around vector features of given type.
v.build Creates topology for vector map.
v.build.polylines Builds polylines from lines or boundaries.
v.category Attaches, deletes or reports vector categories to map geometry.
v.class Classifies attribute data, e.g. for thematic mapping
v.clean Toolset for cleaning topology of vector map.
v.cluster Performs cluster identification.
v.colors Creates/modifies the color table associated with a vector map.
v.colors.out Exports the color table associated with a vector map.
v.db.connect Prints/sets DB connection for a vector map to attribute table.
v.db.select Prints vector map attributes.
v.decimate Decimates a point cloud
v.delaunay Creates a Delaunay triangulation from an input vector map containing points or centroids.
v.distance Finds the nearest element in vector map 'to' for elements in vector map 'from'.
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.external Creates a new pseudo-vector map as a link to an OGR-supported layer or a PostGIS feature table.
v.external.out Defines vector output format.
v.extract Selects vector features from an existing vector map and creates a new vector map containing only the selected features.
v.extrude Extrudes flat vector features to 3D vector features with defined height.
v.generalize Performs vector based generalization.
v.hull Produces a 2D/3D convex hull for a given vector map.
v.in.ascii Creates a vector map from an ASCII points file or ASCII vector file.
v.in.db Creates new vector (points) map from database table containing coordinates.
v.in.dxf Converts file in DXF format to GRASS vector map.
v.in.ogr Imports vector data into a GRASS vector map using OGR library.
v.in.region Creates a vector polygon from the current region extent.
v.info Outputs basic information about a vector map.
v.kcv Randomly partition points into test/train sets.
v.kernel Generates a raster density map from vector points map.
v.label Creates paint labels for a vector map from attached attributes.
v.lidar.correction Corrects the v.lidar.growing output. It is the last of the three algorithms for LIDAR filtering.
v.lidar.edgedetection Detects the object's edges from a LIDAR data set.
v.lidar.growing Building contour determination and Region Growing algorithm for determining the building inside
v.lrs.create Creates a linear reference system.
v.lrs.label Creates stationing from input lines, and linear reference system.
v.lrs.segment Creates points/segments from input lines, linear reference system and positions read from stdin or a file.
v.lrs.where Finds line id and real km+offset for given points in vector map using linear reference system.
v.mkgrid Creates a vector map of a user-defined grid.
v.neighbors Neighborhood analysis tool for vector point maps.
v.net.alloc Allocates subnets for nearest centers (direction from center).
v.net.allpairs Computes the shortest path between all pairs of nodes in the network.
v.net.bridge Computes bridges and articulation points in the network.
v.net.centrality Computes degree, centrality, betweeness, closeness and eigenvector centrality measures in the network.
v.net.components Computes strongly and weakly connected components in the network.
v.net.connectivity Computes vertex connectivity between two sets of nodes in the network.
v.net.distance Computes shortest distance via the network between the given sets of features.
v.net.flow Computes the maximum flow between two sets of nodes in the network.
v.net Performs network maintenance.
v.net.iso Splits net by cost isolines.
v.net.path Finds shortest path on vector network.
v.net.salesman Creates a cycle connecting given nodes (Traveling salesman problem).
v.net.spanningtree Computes minimum spanning tree for the network.
v.net.steiner Creates Steiner tree for the network and given terminals.
v.net.timetable Finds shortest path using timetables.
v.net.visibility Performs visibility graph construction.
v.normal Tests for normality for vector points.
v.out.ascii Exports a vector map to a GRASS ASCII vector representation.
v.out.dxf Exports vector map to DXF file format.
v.out.ogr Exports a vector map layer to any of the supported OGR vector formats.
v.out.postgis Exports a vector map layer to PostGIS feature table.
v.out.pov Converts GRASS x,y,z points to POV-Ray x,z,y format.
v.out.svg Exports a vector map to SVG file.
v.out.vtk Converts a vector map to VTK ASCII output.
v.outlier Removes outliers from vector point data.
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.proj Re-projects a vector map from one location to the current location.
v.qcount Indices for quadrat counts of vector point lists.
v.random Generates random 2D/3D vector points.
v.reclass Changes vector category values for an existing vector map according to results of SQL queries or a value in attribute table column.
v.rectify Rectifies a vector by computing a coordinate transformation for each object in the vector based on the control points.
v.sample Samples a raster map at vector point locations.
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.support Updates vector map metadata.
v.surf.bspline Performs bicubic or bilinear spline interpolation with Tykhonov regularization.
v.surf.idw Provides surface interpolation from vector point data by Inverse Distance Squared Weighting.
v.surf.rst Performs surface interpolation from vector points map by splines.
v.timestamp Modifies a timestamp for a vector map.
v.to.3d Performs transformation of 2D vector features to 3D.
v.to.db Populates attribute values from vector features.
v.to.points Creates points along input lines in new vector map with 2 layers.
v.to.rast Converts (rasterize) a vector map into a raster map.
v.to.rast3 Converts a vector map (only points) into a 3D raster map.
v.transform Performs an affine transformation (shift, scale and rotate) on vector map.
v.type Changes type of vector features.
v.univar Calculates univariate statistics of vector map features.
v.vect.stats Count points in areas, calculate statistics from point attributes.
v.vol.rst Interpolates point data to a 3D raster map using regularized spline with tension (RST) algorithm.
v.voronoi Creates a Voronoi diagram in current region from an input vector map containing points or centroids.
v.what Queries a vector map at given locations.
v.what.rast Uploads raster values at positions of vector points to the table.
v.what.rast3 Uploads 3D raster values at positions of vector points to the table.

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© 2003-2018 GRASS Development Team, GRASS GIS 7.2.3 Reference Manual