Note: A new GRASS GIS stable version has been released: GRASS GIS 7.4, available here.
Updated manual page: here
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).
| 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.correlate | Prints a graph of the correlation between raster maps (in pairs). |
| 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.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.out.file | Saves the contents of the active display monitor to a graphics file. |
| d.path | Finds shortest path for selected starting and ending node. |
| d.polar | Draws polar diagram of angle map such as aspect or flow directions |
| 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.edit | Edits cell values in a raster map. |
| d.rast | Displays user-specified raster map in the active graphics frame. |
| d.rast.leg | Displays a raster map and its legend on a graphics window |
| d.rast.num | Overlays cell category values on a raster map displayed in the active graphics frame. |
| d.redraw | Redraws the content of currently selected monitor. |
| 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.shade | Drapes a color raster over an shaded relief or aspect map. |
| 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.to.rast | Saves the contents of the active display monitor to a raster map. |
| 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.what.rast | Allows the user to interactively query raster map layers at user-selected locations. |
| d.what.vect | Allows the user to interactively query vector map layers at user-selected locations. |
| d.where | Identifies the geographic coordinates associated with point locations given in display coordinates. |
| g.access | Controls access to the current mapset for other users on the system.
|
| 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.extension.all | Rebuilds or removes all locally installed GRASS Addons extensions.
|
| g.extension | Maintains GRASS Addons extensions in local GRASS installation.
|
| 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.animation | Tool for animating a series of raster and vector maps or a space time raster or vector dataset. |
| g.gui.dbmgr | Launches graphical attribute table manager. |
| g.gui.gcp | Georectifies a map and allows managing Ground Control Points. |
| g.gui.gmodeler | Graphical Modeler.
|
| g.gui | Launches a GRASS graphical user interface (GUI) session.
|
| g.gui.iclass | Tool for supervised classification of imagery data.
|
| g.gui.mapswipe | Interactively compares two maps by swiping a visibility bar. |
| g.gui.psmap | Tool for creating hardcopy map outputs. |
| g.gui.rlisetup | Configuration tool for r.li modules. |
| g.gui.timeline | Allows comparing temporal datasets by displaying their temporal extents in a plot. |
| g.gui.tplot | Plots the values of temporal datasets. |
| g.gui.vdigit | Interactive editing and digitization of vector maps. |
| g.list | Lists available GRASS data base files of the user-specified data type optionally using the search pattern. |
| g.manual | Displays the manual pages of GRASS modules. |
| 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.search.modules | Search in GRASS modules using keywords |
| g.tempfile | Creates a temporary file and prints it's file name. |
| g.version | Displays GRASS GIS version info.
|
| 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.colors.enhance | Performs auto-balancing of colors for RGB images. |
| 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.image.mosaic | Mosaics several images and extends colormap. |
| i.in.spotvgt | Imports SPOT VGT NDVI data into a raster map. |
| 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.oif | Calculates Optimum-Index-Factor table for spectral bands |
| 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.pansharpen | Image fusion algorithms to sharpen multispectral with high-res panchromatic channels |
| 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.spectral | Displays spectral response at user specified locations in group or images. |
| i.target | Targets an imagery group to a GRASS location and mapset. |
| i.tasscap | Performs Tasseled Cap (Kauth Thomas) transformation. |
| 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. |
| r.basins.fill | Generates watershed subbasins raster map. |
| r.blend | Blends color components of two raster maps by a given ratio. |
| r.buffer | Creates a raster map showing buffer zones surrounding cells that contain non-NULL category values. |
| r.buffer.lowmem | 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.colors.stddev | Sets color rules based on stddev from a raster map's mean value. |
| 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 | Defines raster output format utilizing GDAL library. |
| r.fill.dir | Filters and generates a depressionless elevation map and a flow direction map from a given elevation raster map. |
| r.fillnulls | Fills no-data areas in raster maps using spline interpolation. |
| r.flow | Constructs flowlines.
|
| r.grow.distance | Generates a raster map containing distances to nearest raster features. |
| r.grow | Generates a raster map layer with contiguous areas grown by one cell. |
| 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.import | Imports raster data into a GRASS raster map using GDAL library and reprojects on the fly. |
| r.in.ascii | Converts a GRASS ASCII raster file to binary raster map. |
| r.in.aster | Georeference, rectify, and import Terra-ASTER imagery and relative DEMs using gdalwarp. |
| 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.lidar | Creates a raster map from LAS LiDAR points using univariate statistics. |
| 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.srtm | Imports SRTM HGT files into raster map. |
| r.in.wms | Downloads and imports data from WMS/WMTS/NASA OnEarth server. |
| 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 | |
| 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.mask | Creates a MASK for limiting raster operation. |
| 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.out.xyz | Exports a raster map to a text file as x,y,z values based on cell centers. |
| r.pack | Exports a raster map as GRASS GIS specific archive file |
| 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.plane | Creates raster plane map given dip (inclination), aspect (azimuth) and one point. |
| 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.area | Reclasses a raster map greater or less than user specified area size (in hectares). |
| 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.rgb | Splits a raster map into red, green and blue maps. |
| 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.shade | Drapes a color raster over an shaded relief or aspect map. |
| 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.
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| r.sunmask | Calculates cast shadow areas from sun position and elevation raster map.
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| 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.tileset | Produces tilings of the source projection for use in the destination region and projection. |
| 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.unpack | Imports a raster map as GRASS GIS specific archive file (packed with r.pack) |
| 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. |
| t.connect | Prints/sets general temporal GIS database connection for current mapset. |
| t.create | Creates a space time dataset. |
| t.info | Lists information about space time datasets and maps. |
| t.list | Lists space time datasets and maps registered in the temporal database. |
| t.merge | Merges several space time datasets into a single space time dataset. |
| t.rast.accdetect | Detects accumulation patterns in temporally accumulated space time raster datasets created by t.rast.accumulate. |
| t.rast.accumulate | Computes cyclic accumulations of a space time raster dataset. |
| t.rast.aggregate.ds | Aggregates data of an existing space time raster dataset using the time intervals of a second space time dataset. |
| t.rast.aggregate | Aggregates temporally the maps of a space time raster dataset by a user defined granularity. |
| t.rast.colors | Creates/modifies the color table associated with each raster map of the space time raster dataset. |
| t.rast.export | Exports space time raster dataset. |
| t.rast.extract | Extracts a subset of a space time raster datasets. |
| t.rast.gapfill | Replaces gaps in a space time raster dataset with interpolated raster maps. |
| t.rast.import | Imports space time raster dataset. |
| t.rast.list | Lists registered maps of a space time raster dataset. |
| t.rast.mapcalc | Performs spatio-temporal mapcalc expressions on temporally sampled maps of space time raster datasets. |
| t.rast.neighbors | Performs a neighborhood analysis for each map in a space time raster dataset. |
| t.rast.out.vtk | Exports space time raster dataset as VTK time series. |
| t.rast.series | Performs different aggregation algorithms from r.series on all or a subset of raster maps in a space time raster dataset. |
| t.rast.to.rast3 | Converts a space time raster dataset into a 3D raster map. |
| t.rast.univar | Calculates univariate statistics from the non-null cells for each registered raster map of a space time raster dataset. |
| t.rast3d.extract | Extracts a subset of a space time 3D raster dataset. |
| t.rast3d.list | Lists registered maps of a space time raster3d dataset. |
| t.rast3d.mapcalc | Performs r3.mapcalc expressions on maps of sampled space time 3D raster datasets. |
| t.rast3d.univar | Calculates univariate statistics from the non-null cells for each registered 3D raster map of a space time 3D raster dataset. |
| t.register | Registers raster, vector and raster3d maps in a space time datasets. |
| t.remove | Removes space time datasets from temporal database. |
| t.rename | Renames a space time dataset |
| t.sample | Samples the input space time dataset(s) with a sample space time dataset and print the result to stdout. |
| t.select | Select maps from space time datasets by topological relationships to other space time datasets using temporal algebra. |
| t.shift | Shifts temporally the maps of a space time dataset. |
| t.snap | Snaps temporally the maps of a space time dataset. |
| t.support | Modifies the metadata of a space time dataset. |
| t.topology | Lists temporal topology of a space time dataset. |
| t.unregister | Unregisters raster, vector and raster3d maps from the temporal database or a specific space time dataset. |
| t.vect.db.select | Prints attributes of vector maps registered in a space time vector dataset. |
| t.vect.export | Exports a space time vector dataset as GRASS GIS specific archive file. |
| t.vect.extract | Extracts a subset of a space time vector dataset. |
| t.vect.import | Imports a space time vector dataset from a GRASS GIS specific archive file. |
| t.vect.list | Lists registered maps of a space time vector dataset. |
| t.vect.observe.strds | Observes specific locations in a space time raster dataset over a period of time using vector points. |
| t.vect.univar | Calculates univariate statistics of attributes for each registered vector map of a space time vector dataset |
| t.vect.what.strds | Stores raster map values at spatial and temporal positions of vector points as vector attributes. |
| v.buffer | Creates a buffer around vector features of given type. |
| v.build.all | Rebuilds topology on all vector maps in the current mapset. |
| v.build | Creates topology for vector map.
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| v.build.polylines | Builds polylines from lines or boundaries. |
| v.category | Attaches, deletes or reports vector categories to map geometry. |
| v.centroids | Adds missing centroids to closed boundaries. |
| v.class | Classifies attribute data, e.g. for thematic mapping |
| v.clean | Toolset for cleaning topology of vector map. |
| 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.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.connect | Prints/sets DB connection for a vector map to attribute table. |
| 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.select | Prints vector map attributes. |
| 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.delaunay | Creates a Delaunay triangulation from an input vector map containing points or centroids. |
| v.dissolve | Dissolves boundaries between adjacent areas sharing a common category number or attribute. |
| 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.
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| v.generalize | Performs vector based generalization. |
| v.hull | Produces a 2D/3D convex hull for a given vector map. |
| v.import | Imports vector data into a GRASS vector map using OGR library and reprojects on the fly. |
| 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.e00 | Imports E00 file into a vector map. |
| v.in.geonames | Imports geonames.org country files into a vector points map. |
| v.in.lidar | Converts LAS LiDAR point clouds to a GRASS vector map with libLAS. |
| 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.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.in.wfs | Imports GetFeature from a WFS server. |
| 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.
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| v.krige | Performs ordinary or block kriging for vector maps. |
| 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.
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| v.net.alloc | Allocates subnets for nearest centers (direction from center).
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| 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.
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| 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.
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| v.net.path | Finds shortest path on vector network. |
| v.net.salesman | Creates a cycle connecting given nodes (Traveling salesman problem).
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| v.net.spanningtree | Computes minimum spanning tree for the network. |
| v.net.steiner | Creates Steiner tree for the network and given terminals.
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| 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.
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| 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.
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| 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.pack | Exports a vector map as GRASS GIS specific archive file |
| 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.rast.stats | Calculates univariate statistics from a raster map based on a vector map and uploads statistics to new attribute columns. |
| 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.report | Reports geometry statistics for vector maps. |
| 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.
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| v.timestamp | Modifies a timestamp for a vector map.
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| v.to.3d | Performs transformation of 2D vector features to 3D. |
| v.to.db | Populates attribute values from vector features. |
| 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.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.
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| v.unpack | Imports a vector map as GRASS GIS specific archive file (packed with v.pack) |
| 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. |
| 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. |
Note: A new GRASS GIS stable version has been released: GRASS GIS 7.4, available here.
Updated manual page: here
