section 1grass — User commands

• cairodriver(1grass)
• d.background(1grass) Fills the graphics display frame with user defined color.
• d.barscale(1grass) Displays a barscale on the graphics monitor.
• d.colorlist(1grass) Outputs a list of all available display colors.
• d.colortable(1grass) Displays the color table associated with a raster map layer.
• d.correlate(1grass) Prints a graph of the correlation between raster maps (in pairs).
• d.erase(1grass) Erases the contents of the active graphics display frame with user defined color.
• d.font(1grass) Selects the font in which text will be displayed on the user’s graphics monitor.
• d.fontlist(1grass) Lists the available fonts.
• d.frame(1grass) Manages display frames on the user’s graphics monitor.
• d.geodesic(1grass) Displays a geodesic line, tracing the shortest distance between two geographic points along a great circle, in a longitude/latitude data set.
• d.graph(1grass) Program for generating and displaying simple graphics on the display monitor.
• d.grid(1grass) Overlays a user-specified grid in the active display frame on the graphics monitor.
• d.his(1grass) Displays the result obtained by combining hue, intensity, and saturation (HIS) values from user-specified input raster map layers.
• d.histogram(1grass) Displays a histogram in the form of a pie or bar chart for a user-specified raster map.
• d.info(1grass) Displays information about the active display monitor.
• d.labels(1grass) Displays text labels (created with v.label) to the active frame on the graphics monitor.
• d.legend(1grass) Displays a legend for a 2D or 3D raster map in the active frame of the graphics monitor.
• d.legend.vect(1grass) Displays a vector legend in the active graphics frame.
• d.linegraph(1grass) Generates and displays simple line graphs in the active graphics monitor display frame.
• d.mon(1grass) Controls graphics display monitors from the command line.
• d.northarrow(1grass) Displays a north arrow on the graphics monitor.
• d.out.file(1grass) Saves the contents of the active display monitor to a graphics file.
• d.path(1grass) Finds shortest path for selected starting and ending node.
• d.polar(1grass) Draws polar diagram of angle map such as aspect or flow directions
• d.profile(1grass) Plots profile of a transect.
• d.rast(1grass) Displays user-specified raster map in the active graphics frame.
• d.rast.arrow(1grass) Draws arrows representing cell aspect direction for a raster map containing aspect data.
• d.rast.edit(1grass) Edits cell values in a raster map.
• d.rast.leg(1grass) Displays a raster map and its legend on a graphics window
• d.rast.num(1grass) Overlays cell category values on a raster map displayed in the active graphics frame.
• d.redraw(1grass) Redraws the content of currently selected monitor.
• d.rgb(1grass) Displays three user-specified raster maps as red, green, and blue overlays in the active graphics frame.
• d.rhumbline(1grass) Displays the rhumbline joining two longitude/latitude coordinates.
• d.shade(1grass) Drapes a color raster over an shaded relief or aspect map.
• d.text(1grass) Draws text in the active display frame on the graphics monitor using the current font.
• d.title(1grass) Create a TITLE for a raster map in a form suitable for display with d.text.
• d.to.rast(1grass) Saves the contents of the active display monitor to a raster map.
• d.vect(1grass) Displays user-specified vector map in the active graphics frame.
• d.vect.chart(1grass) Displays charts of vector data in the active frame on the graphics monitor.
• d.vect.thematic(1grass) Displays a thematic vector map in the active graphics frame.
• d.what.rast(1grass) Allows the user to interactively query raster map layers at user-selected locations.
• d.what.vect(1grass) Allows the user to interactively query vector map layers at user-selected locations.
• d.where(1grass) Identifies the geographic coordinates associated with point locations given in display coordinates.
• database(1grass)
• database_graphical(1grass)
• databaseintro(1grass)
• db.columns(1grass) List all columns for a given table.
• db.connect(1grass) Prints/sets general DB connection for current mapset.
• db.copy(1grass) Copy a table.
• db.createdb(1grass) Creates an empty database.
• db.databases(1grass) Lists all databases for a given driver and location.
• db.describe(1grass) Describes a table in detail.
• db.drivers(1grass) Lists all database drivers.
• db.dropcolumn(1grass) Drops a column from selected attribute table.
• db.dropdb(1grass) Removes an existing database.
• db.droptable(1grass) Drops an attribute table.
• db.execute(1grass) Executes any SQL statement.
• db.in.ogr(1grass) Imports attribute tables in various formats.
• db.login(1grass) Sets user/password for DB driver/database.
• db.out.ogr(1grass) Exports attribute tables into various formats.
• db.select(1grass) Selects data from attribute table.
• db.tables(1grass) Lists all tables for a given database.
• db.test(1grass) Test database driver, database must exist and set by db.connect.
• db.univar(1grass) Calculates univariate statistics on selected table column.
• display(1grass)
• display_graphical(1grass)
• displaydrivers(1grass)
• full_index(1grass)
• g.access(1grass) Controls access to the current mapset for other users on the system.
• g.cairocomp(1grass) Overlays multiple X Pixmaps.
• g.copy(1grass) Creates copies of maps and other elements
• g.dirseps(1grass) Internal GRASS utility for converting directory separator characters.
• g.download.location(1grass) Download GRASS Location from the web
• g.extension(1grass) Maintains GRASS Addons extensions in local GRASS installation.
• g.extension.all(1grass) Rebuilds or removes all locally installed GRASS Addons extensions.
• g.filename(1grass) Prints GRASS data base file names.
• g.findetc(1grass) Searches for GRASS support files.
• g.findfile(1grass) Searches for GRASS data base files and sets variables for the shell.
• g.gisenv(1grass) Outputs and modifies the user’s current GRASS variable settings.
• g.gui(1grass) Launches a GRASS graphical user interface (GUI) session.
• g.gui.animation(1grass) Tool for animating a series of raster and vector maps or a space time raster or vector dataset.
• g.gui.datacatalog(1grass) Tool for browsing, modifying and managing GRASS maps.
• g.gui.dbmgr(1grass) Launches graphical attribute table manager.
• g.gui.gcp(1grass) Georectifies a map and allows managing Ground Control Points.
• g.gui.gmodeler(1grass) Graphical Modeler.
• g.gui.iclass(1grass) Tool for supervised classification of imagery data.
• g.gui.image2target(1grass) Georectifies a map and allows managing Ground Control Points for 3D correction.
• g.gui.mapswipe(1grass) Interactively compares two maps by swiping a visibility bar.
• g.gui.photo2image(1grass) Corrects scanning distortions of a paper photo.
• g.gui.psmap(1grass) Tool for creating hardcopy map outputs.
• g.gui.rdigit(1grass) Interactive editing and digitizing of raster maps.
• g.gui.rlisetup(1grass) Configuration tool for r.li modules.
• g.gui.timeline(1grass) Allows comparing temporal datasets by displaying their temporal extents in a plot.
• g.gui.tplot(1grass) Plots the values of temporal datasets.
• g.gui.vdigit(1grass) Interactive editing and digitization of vector maps.
• g.list(1grass) Lists available GRASS data base files of the user-specified data type optionally using the search pattern.
• g.manual(1grass) Displays the manual pages of GRASS modules.
• g.mapset(1grass) Changes/reports current mapset.
• g.mapsets(1grass) Modifies/prints the user’s current mapset search path.
• g.message(1grass) Prints a message, warning, progress info, or fatal error in the GRASS way.
• g.mkfontcap(1grass) Generates the font configuration file by scanning various directories for fonts.
• g.parser(1grass) Provides full parser support for GRASS scripts.
• g.pnmcomp(1grass) Overlays multiple PPM image files.
• g.ppmtopng(1grass) Converts between PPM/PGM and PNG image formats.
• g.proj(1grass) Prints or modifies GRASS projection information files (in various co-ordinate system descriptions).
• g.region(1grass) Manages the boundary definitions for the geographic region.
• g.remove(1grass) Removes data base element files from the user’s current mapset using the search pattern.
• g.rename(1grass) Renames data base element files in the user’s current mapset.
• g.search.modules(1grass) Search in GRASS modules using keywords
• g.tempfile(1grass) Creates a temporary file and prints it’s file name.
• g.version(1grass) Displays GRASS GIS version info.
• general(1grass)
• general_graphical(1grass)
• graphical_index(1grass)
• grass(1grass)
• grass-dbf(1grass)
• grass-mysql(1grass)
• grass-odbc(1grass)
• grass-ogr(1grass)
• grass-pg(1grass)
• grass-sqlite(1grass)
• grass_database(1grass)
• guimodules_graphical(1grass)
• helptext(1grass)
• htmldriver(1grass)
• i.albedo(1grass) Computes broad band albedo from surface reflectance.
• i.aster.toar(1grass) Calculates Top of Atmosphere Radiance/Reflectance/Brightness Temperature from ASTER DN.
• i.atcorr(1grass) Performs atmospheric correction using the 6S algorithm.
• i.band.library(1grass) Prints available semantic label information used for multispectral data.
• i.biomass(1grass) Computes biomass growth, precursor of crop yield calculation.
• i.cca(1grass) Canonical components analysis (CCA) program for image processing.
• i.cluster(1grass) Generates spectral signatures for land cover types in an image using a clustering algorithm.
• i.colors.enhance(1grass) Performs auto-balancing of colors for RGB images.
• i.eb.eta(1grass) Actual evapotranspiration for diurnal period (Bastiaanssen, 1995).
• i.eb.evapfr(1grass) Computes evaporative fraction and root zone soil moisture.
• i.eb.hsebal01(1grass) Computes sensible heat flux iteration SEBAL 01.
• i.eb.netrad(1grass) Net radiation approximation (Bastiaanssen, 1995).
• i.eb.soilheatflux(1grass) Soil heat flux approximation (Bastiaanssen, 1995).
• i.emissivity(1grass) Computes emissivity from NDVI, generic method for sparse land.
• i.evapo.mh(1grass) Computes evapotranspiration calculation modified or original Hargreaves formulation, 2001.
• i.evapo.pm(1grass) Computes potential evapotranspiration calculation with hourly Penman-Monteith.
• i.evapo.pt(1grass) Computes evapotranspiration calculation Priestley and Taylor formulation, 1972.
• i.evapo.time(1grass) Computes temporal integration of satellite ET actual (ETa) following the daily ET reference (ETo) from meteorological station(s).
• i.fft(1grass) Fast Fourier Transform (FFT) for image processing.
• i.gensig(1grass) Generates statistics for i.maxlik from raster map.
• i.gensigset(1grass) Generates statistics for i.smap from raster map.
• i.group(1grass) Creates, edits, and lists groups of imagery data.
• i.his.rgb(1grass) Transforms raster maps from HIS (Hue-Intensity-Saturation) color space to RGB (Red-Green-Blue) color space.
• i.ifft(1grass) Inverse Fast Fourier Transform (IFFT) for image processing.
• i.image.mosaic(1grass) Mosaics several images and extends colormap.
• i.in.spotvgt(1grass) Imports SPOT VGT NDVI data into a raster map.
• i.landsat.acca(1grass) Performs Landsat TM/ETM+ Automatic Cloud Cover Assessment (ACCA).
• i.landsat.toar(1grass) Calculates top-of-atmosphere radiance or reflectance and temperature for Landsat MSS/TM/ETM+/OLI
• i.maxlik(1grass) Classifies the cell spectral reflectances in imagery data.
• i.modis.qc(1grass) Extracts quality control parameters from MODIS QC layers.
• i.oif(1grass) Calculates Optimum-Index-Factor table for spectral bands
• i.ortho.camera(1grass) Select and modify the imagery group camera reference file.
• i.ortho.elev(1grass) Select or modify the target elevation model.
• i.ortho.init(1grass) Interactively creates or modifies entries in a camera initial exposure station file for imagery group referenced by a sub-block.
• i.ortho.photo(1grass) Menu driver for the photo imagery programs.
• i.ortho.rectify(1grass) Orthorectifies an image by using the image to photo coordinate transformation matrix.
• i.ortho.target(1grass) Select or modify the imagery group target.
• i.ortho.transform(1grass) Computes a coordinate transformation based on the control points.
• i.pansharpen(1grass) Image fusion algorithms to sharpen multispectral with high-res panchromatic channels
• i.pca(1grass) Principal components analysis (PCA) for image processing.
• i.rectify(1grass) Rectifies an image by computing a coordinate transformation for each pixel in the image based on the control points.
• i.rgb.his(1grass) Transforms raster maps from RGB (Red-Green-Blue) color space to HIS (Hue-Intensity-Saturation) color space.
• i.segment(1grass) Identifies segments (objects) from imagery data.
• i.smap(1grass) Performs contextual image classification using sequential maximum a posteriori (SMAP) estimation.
• i.spectral(1grass) Displays spectral response at user specified locations in group or images.
• i.target(1grass) Targets an imagery group to a GRASS location and mapset.
• i.tasscap(1grass) Performs Tasseled Cap (Kauth Thomas) transformation.
• i.topo.corr(1grass) Computes topographic correction of reflectance.
• i.vi(1grass) Calculates different types of vegetation indices.
• i.zc(1grass) Zero-crossing "edge detection" raster function for image processing.
• imagery(1grass)
• imagery_graphical(1grass)
• imageryintro(1grass)
• index(1grass)
• keywords(1grass)
• lrs(1grass)
• m.cogo(1grass) A simple utility for converting bearing and distance measurements to coordinates and vice versa.
• m.measure(1grass) Measures the lengths and areas of features.
• m.nviz.image(1grass) Creates a 3D rendering of GIS data.
• m.nviz.script(1grass) Creates fly-through script to run in NVIZ.
• m.proj(1grass) Converts coordinates from one projection to another (cs2cs frontend).
• m.transform(1grass) Computes a coordinate transformation based on the control points.
• manual_gallery(1grass)
• miscellaneous(1grass)
• miscellaneous_graphical(1grass)
• parser_standard_options(1grass)
• pngdriver(1grass)
• postscript(1grass)
• postscript_graphical(1grass)
• projectionintro(1grass)
• ps.map(1grass) Produces hardcopy PostScript map output.
• psdriver(1grass)
• r.basins.fill(1grass) Generates watershed subbasins raster map.
• r.blend(1grass) Blends color components of two raster maps by a given ratio.
• r.buffer(1grass) Creates a raster map showing buffer zones surrounding cells that contain non-NULL category values.
• r.buffer.lowmem(1grass) Creates a raster map showing buffer zones surrounding cells that contain non-NULL category values.
• r.buildvrt(1grass) Build a VRT (Virtual Raster) from the list of input raster maps.
• r.carve(1grass) Generates stream channels.
• r.category(1grass) Manages category values and labels associated with user-specified raster map layers.
• r.circle(1grass) Creates a raster map containing concentric rings around a given point.
• r.clump(1grass) Recategorizes data in a raster map by grouping cells that form physically discrete areas into unique categories.
• r.coin(1grass) Tabulates the mutual occurrence (coincidence) of categories for two raster map layers.
• r.colors(1grass) Creates/modifies the color table associated with a raster map.
• r.colors.out(1grass) Exports the color table associated with a raster map.
• r.colors.stddev(1grass) Sets color rules based on stddev from a raster map’s mean value.
• r.composite(1grass) Combines red, green and blue raster maps into a single composite raster map.
• r.compress(1grass) Compresses and decompresses raster maps.
• r.contour(1grass) Produces a vector map of specified contours from a raster map.
• r.cost(1grass) 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(1grass) Outputs a covariance/correlation matrix for user-specified raster map layer(s).
• r.cross(1grass) Creates a cross product of the category values from multiple raster map layers.
• r.describe(1grass) Prints terse list of category values found in a raster map layer.
• r.distance(1grass) Locates the closest points between objects in two raster maps.
• r.drain(1grass) Traces a flow through an elevation model or cost surface on a raster map.
• r.external(1grass) Links GDAL supported raster data as a pseudo GRASS raster map.
• r.external.out(1grass) Redirects raster output to file utilizing GDAL library rather than storing in GRASS raster format.
• r.fill.dir(1grass) Filters and generates a depressionless elevation map and a flow direction map from a given elevation raster map.
• r.fill.stats(1grass) Rapidly fills ’no data’ cells (NULLs) of a raster map with interpolated values (IDW).
• r.fillnulls(1grass) Fills no-data areas in raster maps using spline interpolation.
• r.flow(1grass) Constructs flowlines.
• r.geomorphon(1grass) Calculates geomorphons (terrain forms) and associated geometry using machine vision approach.
• r.grow(1grass) Generates a raster map layer with contiguous areas grown by one cell.
• r.grow.distance(1grass) Generates a raster map containing distances to nearest raster features and/or the value of the nearest non-null cell.
• r.gwflow(1grass) Numerical calculation program for transient, confined and unconfined groundwater flow in two dimensions.
• r.his(1grass) 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(1grass) Computes horizon angle height from a digital elevation model.
• r.import(1grass) Imports raster data into a GRASS raster map using GDAL library and reprojects on the fly.
• r.in.ascii(1grass) Converts a GRASS ASCII raster file to binary raster map.
• r.in.aster(1grass) Georeference, rectify, and import Terra-ASTER imagery and relative DEMs using gdalwarp.
• r.in.bin(1grass) Import a binary raster file into a GRASS raster map layer.
• r.in.gdal(1grass) Imports raster data into a GRASS raster map using GDAL library.
• r.in.gridatb(1grass) Imports GRIDATB.FOR map file (TOPMODEL) into a GRASS raster map.
• r.in.mat(1grass) Imports a binary MAT-File(v4) to a GRASS raster.
• r.in.png(1grass) Imports non-georeferenced PNG format image.
• r.in.poly(1grass) Creates raster maps from ASCII polygon/line/point data files.
• r.in.srtm(1grass) Imports SRTM HGT files into raster map.
• r.in.wms(1grass) Downloads and imports data from OGC WMS and OGC WMTS web mapping servers.
• r.in.xyz(1grass) Creates a raster map from an assemblage of many coordinates using univariate statistics.
• r.info(1grass) Outputs basic information about a raster map.
• r.kappa(1grass) Calculates error matrix and kappa parameter for accuracy assessment of classification result.
• r.lake(1grass) Fills lake at given point to given level.
• r.latlong(1grass) Creates a latitude/longitude raster map.
• r.li(1grass) Toolset for multiscale analysis of landscape structure
• r.li.cwed(1grass) Calculates contrast weighted edge density index on a raster map
• r.li.daemon(1grass)
• r.li.dominance(1grass) Calculates dominance’s diversity index on a raster map
• r.li.edgedensity(1grass) Calculates edge density index on a raster map, using a 4 neighbour algorithm
• r.li.mpa(1grass) Calculates mean pixel attribute index on a raster map
• r.li.mps(1grass) Calculates mean patch size index on a raster map, using a 4 neighbour algorithm
• r.li.padcv(1grass) Calculates coefficient of variation of patch area on a raster map
• r.li.padrange(1grass) Calculates range of patch area size on a raster map
• r.li.padsd(1grass) Calculates standard deviation of patch area a raster map
• r.li.patchdensity(1grass) Calculates patch density index on a raster map, using a 4 neighbour algorithm
• r.li.patchnum(1grass) Calculates patch number index on a raster map, using a 4 neighbour algorithm.
• r.li.pielou(1grass) Calculates Pielou’s diversity index on a raster map
• r.li.renyi(1grass) Calculates Renyi’s diversity index on a raster map
• r.li.richness(1grass) Calculates richness index on a raster map
• r.li.shannon(1grass) Calculates Shannon’s diversity index on a raster map
• r.li.shape(1grass) Calculates shape index on a raster map
• r.li.simpson(1grass) Calculates Simpson’s diversity index on a raster map
• r.mapcalc(1grass) Raster map calculator.
• r.mapcalc.simple(1grass) Calculates a new raster map from a simple r.mapcalc expression.
• r.mask(1grass) Creates a MASK for limiting raster operation.
• r.mfilter(1grass) Performs raster map matrix filter.
• r.mode(1grass) Finds the mode of values in a cover map within areas assigned the same category value in a user-specified base map.
• r.neighbors(1grass) 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(1grass) Manages NULL-values of given raster map.
• r.object.geometry(1grass) Calculates geometry parameters for raster objects.
• r.out.ascii(1grass) Converts a raster map layer into a GRASS ASCII text file.
• r.out.bin(1grass) Exports a GRASS raster to a binary array.
• r.out.gdal(1grass) Exports GRASS raster maps into GDAL supported formats.
• r.out.gridatb(1grass) Exports GRASS raster map to GRIDATB.FOR map file (TOPMODEL).
• r.out.mat(1grass) Exports a GRASS raster to a binary MAT-File.
• r.out.mpeg(1grass) Converts raster map series to MPEG movie.
• r.out.png(1grass) Export a GRASS raster map as a non-georeferenced PNG image.
• r.out.pov(1grass) Converts a raster map layer into a height-field file for POV-Ray.
• r.out.ppm(1grass) Converts a GRASS raster map to a PPM image file.
• r.out.ppm3(1grass) Converts 3 GRASS raster layers (R, G, B) to a PPM image file.
• r.out.vrml(1grass) Exports a raster map to the Virtual Reality Modeling Language (VRML).
• r.out.vtk(1grass) Converts raster maps into the VTK-ASCII format.
• r.out.xyz(1grass) Exports a raster map to a text file as x, y, z values based on cell centers.
• r.pack(1grass) Exports a raster map as GRASS GIS specific archive file
• r.param.scale(1grass) Extracts terrain parameters from a DEM.
• r.patch(1grass) 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.path(1grass) Traces paths from starting points following input directions.
• r.plane(1grass) Creates raster plane map given dip (inclination), aspect (azimuth) and one point.
• r.profile(1grass) Outputs the raster map layer values lying on user-defined line(s).
• r.proj(1grass) Re-projects a raster map from given location to the current location.
• r.quant(1grass) Produces the quantization file for a floating-point map.
• r.quantile(1grass) Compute quantiles using two passes.
• r.random(1grass) Creates randomly placed raster cells or vector points
• r.random.cells(1grass) Generates random cell values with spatial dependence.
• r.random.surface(1grass) Generates random surface(s) with spatial dependence.
• r.reclass(1grass) Reclassify raster map based on category values.
• r.reclass.area(1grass) Reclasses a raster map greater or less than user specified area size (in hectares).
• r.recode(1grass) Recodes categorical raster maps.
• r.region(1grass) Sets the boundary definitions for a raster map.
• r.regression.line(1grass) Calculates linear regression from two raster maps: y = a + b*x.
• r.regression.multi(1grass) Calculates multiple linear regression from raster maps.
• r.relief(1grass) Creates shaded relief map from an elevation map (DEM).
• r.report(1grass) Reports statistics for raster maps.
• r.resamp.bspline(1grass) Performs bilinear or bicubic spline interpolation with Tykhonov regularization.
• r.resamp.filter(1grass) Resamples raster map layers using an analytic kernel.
• r.resamp.interp(1grass) Resamples raster map to a finer grid using interpolation.
• r.resamp.rst(1grass) 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(1grass) Resamples raster map layers to a coarser grid using aggregation.
• r.resample(1grass) GRASS raster map layer data resampling capability.
• r.rescale(1grass) Rescales the range of category values in a raster map layer.
• r.rescale.eq(1grass) Rescales histogram equalized the range of category values in a raster map layer.
• r.rgb(1grass) Splits a raster map into red, green and blue maps.
• r.ros(1grass) Generates rate of spread raster maps.
• r.semantic.label(1grass) Manages semantic label information assigned to a single raster map or to a list of raster maps.
• r.series(1grass) Makes each output cell value a function of the values assigned to the corresponding cells in the input raster map layers.
• r.series.accumulate(1grass) Makes each output cell value a accumulationfunction of the values assigned to the corresponding cells in the input raster map layers.
• r.series.interp(1grass) Interpolates raster maps located (temporal or spatial) in between input raster maps at specific sampling positions.
• r.shade(1grass) Drapes a color raster over an shaded relief or aspect map.
• r.sim.sediment(1grass) Sediment transport and erosion/deposition simulation using path sampling method (SIMWE).
• r.sim.water(1grass) Overland flow hydrologic simulation using path sampling method (SIMWE).
• r.slope.aspect(1grass) Generates raster maps of slope, aspect, curvatures and partial derivatives from an elevation raster map.
• r.solute.transport(1grass) Numerical calculation program for transient, confined and unconfined solute transport in two dimensions
• r.spread(1grass) Simulates elliptically anisotropic spread.
• r.spreadpath(1grass) Recursively traces the least cost path backwards to cells from which the cumulative cost was determined.
• r.statistics(1grass) Calculates category or object oriented statistics.
• r.stats(1grass) Generates area statistics for raster map.
• r.stats.quantile(1grass) Compute category quantiles using two passes.
• r.stats.zonal(1grass) Calculates category or object oriented statistics (accumulator-based statistics).
• r.stream.extract(1grass) Performs stream network extraction.
• r.sun(1grass) Solar irradiance and irradiation model.
• r.sunhours(1grass) Calculates solar elevation, solar azimuth, and sun hours.
• r.sunmask(1grass) Calculates cast shadow areas from sun position and elevation raster map.
• r.support(1grass) Allows creation and/or modification of raster map layer support files.
• r.support.stats(1grass) Update raster map statistics
• r.surf.area(1grass) Prints estimation of surface area for raster map.
• r.surf.contour(1grass) Generates surface raster map from rasterized contours.
• r.surf.fractal(1grass) Creates a fractal surface of a given fractal dimension.
• r.surf.gauss(1grass) Generates a raster map using gaussian random number generator.
• r.surf.idw(1grass) Provides surface interpolation from raster point data by Inverse Distance Squared Weighting.
• r.surf.random(1grass) Produces a raster surface map of uniform random deviates with defined range.
• r.terraflow(1grass) Performs flow computation for massive grids.
• r.texture(1grass) Generate images with textural features from a raster map.
• r.thin(1grass) Thins non-null cells that denote linear features in a raster map layer.
• r.tile(1grass) Splits a raster map into tiles.
• r.tileset(1grass) Produces tilings of the source projection for use in the destination region and projection.
• r.timestamp(1grass) Modifies a timestamp for a raster map.
• r.to.rast3(1grass) Converts 2D raster map slices to one 3D raster volume map.
• r.to.rast3elev(1grass) Creates a 3D volume map based on 2D elevation and value raster maps.
• r.to.vect(1grass) Converts a raster map into a vector map.
• r.topidx(1grass) Creates a topographic index (wetness index) raster map from an elevation raster map.
• r.topmodel(1grass) Simulates TOPMODEL which is a physically based hydrologic model.
• r.transect(1grass) Outputs raster map layer values lying along user defined transect line(s).
• r.univar(1grass) Calculates univariate statistics from the non-null cells of a raster map.
• r.unpack(1grass) Imports a GRASS GIS specific raster archive file (packed with r.pack) as a raster map
• r.uslek(1grass) Computes USLE Soil Erodibility Factor (K).
• r.usler(1grass) Computes USLE R factor, Rainfall erosivity index.
• r.viewshed(1grass) Computes the viewshed of a point on an elevation raster map.
• r.volume(1grass) Calculates the volume of data "clumps".
• r.walk(1grass) 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(1grass) Creates watershed basins from a drainage direction map.
• r.watershed(1grass) Calculates hydrological parameters and RUSLE factors.
• r.what(1grass) Queries raster maps on their category values and category labels.
• r.what.color(1grass) Queries colors for a raster map layer.
• r3.colors(1grass) Creates/modifies the color table associated with a 3D raster map.
• r3.colors.out(1grass) Exports the color table associated with a 3D raster map.
• r3.cross.rast(1grass) Creates cross section 2D raster map from 3D raster map based on 2D elevation map
• r3.flow(1grass) Computes 3D flow lines and 3D flow accumulation.
• r3.gradient(1grass) Computes gradient of a 3D raster map and outputs gradient components as three 3D raster maps.
• r3.gwflow(1grass) Numerical calculation program for transient, confined groundwater flow in three dimensions.
• r3.in.ascii(1grass) Converts a 3D ASCII raster text file into a (binary) 3D raster map.
• r3.in.bin(1grass) Imports a binary raster file into a GRASS 3D raster map.
• r3.in.v5d(1grass) Import 3-dimensional Vis5D files.
• r3.in.xyz(1grass) Create a 3D raster map from an assemblage of many coordinates using univariate statistics
• r3.info(1grass) Outputs basic information about a user-specified 3D raster map layer.
• r3.mapcalc(1grass) Raster map calculator.
• r3.mask(1grass) Establishes the current working 3D raster mask.
• r3.mkdspf(1grass) Creates a display file from an existing 3D raster map according to specified threshold levels.
• r3.neighbors(1grass) 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(1grass) Explicitly create the 3D NULL-value bitmap file.
• r3.out.ascii(1grass) Converts a 3D raster map layer into a ASCII text file.
• r3.out.bin(1grass) Exports a GRASS 3D raster map to a binary array.
• r3.out.netcdf(1grass) Export a 3D raster map as netCDF file.
• r3.out.v5d(1grass) Exports GRASS 3D raster map to 3-dimensional Vis5D file.
• r3.out.vtk(1grass) Converts 3D raster maps into the VTK-ASCII format.
• r3.retile(1grass) Retiles an existing 3D raster map with user defined x, y and z tile size.
• r3.stats(1grass) Generates volume statistics for 3D raster maps.
• r3.support(1grass) Allows creation and/or modification of 3D raster map layer support files.
• r3.timestamp(1grass) Modifies a timestamp for a 3D raster map.
• r3.to.rast(1grass) Converts 3D raster maps to 2D raster maps
• r3.univar(1grass) Calculates univariate statistics from the non-null cells of a 3D raster map.
• raster(1grass)
• raster3d(1grass)
• raster3d_graphical(1grass)
• raster3dintro(1grass)
• raster_graphical(1grass)
• rasterintro(1grass)
• sql(1grass)
• t.connect(1grass) Prints/sets general temporal GIS database connection for current mapset.
• t.copy(1grass) Creates a copy of a space time raster dataset.
• t.create(1grass) Creates a space time dataset.
• t.info(1grass) Lists information about space time datasets and maps.
• t.list(1grass) Lists space time datasets and maps registered in the temporal database.
• t.merge(1grass) Merges several space time datasets into a single space time dataset.
• t.rast.accdetect(1grass) Detects accumulation patterns in temporally accumulated space time raster datasets created by t.rast.accumulate.
• t.rast.accumulate(1grass) Computes cyclic accumulations of a space time raster dataset.
• t.rast.aggregate(1grass) Aggregates temporally the maps of a space time raster dataset by a user defined granularity.
• t.rast.aggregate.ds(1grass) Aggregates data of an existing space time raster dataset using the time intervals of a second space time dataset.
• t.rast.algebra(1grass) Apply temporal and spatial operations on space time raster datasets using temporal raster algebra.
• t.rast.colors(1grass) Creates/modifies the color table associated with each raster map of the space time raster dataset.
• t.rast.contour(1grass) Produces a space time vector dataset of specified contours from a space time raster dataset.
• t.rast.export(1grass) Exports space time raster dataset.
• t.rast.extract(1grass) Extracts a subset of a space time raster datasets.
• t.rast.gapfill(1grass) Replaces gaps in a space time raster dataset with interpolated raster maps.
• t.rast.import(1grass) Imports space time raster dataset.
• t.rast.list(1grass) Lists registered maps of a space time raster dataset.
• t.rast.mapcalc(1grass) Performs spatio-temporal mapcalc expressions on temporally sampled maps of space time raster datasets.
• t.rast.neighbors(1grass) Performs a neighborhood analysis for each map in a space time raster dataset.
• t.rast.out.vtk(1grass) Exports space time raster dataset as VTK time series.
• t.rast.series(1grass) 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(1grass) Converts a space time raster dataset into a 3D raster map.
• t.rast.to.vect(1grass) Converts a space time raster dataset into a space time vector dataset
• t.rast.univar(1grass) Calculates univariate statistics from the non-null cells for each registered raster map of a space time raster dataset.
• t.rast.what(1grass) Sample a space time raster dataset at specific vector point coordinates and write the output to stdout using different layouts
• t.rast3d.algebra(1grass) Apply temporal and spatial operations on space time 3D raster datasets using temporal 3D raster algebra.
• t.rast3d.extract(1grass) Extracts a subset of a space time 3D raster dataset.
• t.rast3d.list(1grass) Lists registered maps of a space time raster3d dataset.
• t.rast3d.mapcalc(1grass) Performs r3.mapcalc expressions on maps of sampled space time 3D raster datasets.
• t.rast3d.univar(1grass) Calculates univariate statistics from the non-null cells for each registered 3D raster map of a space time 3D raster dataset.
• t.register(1grass) Assigns timestamps and registers raster, vector and raster3d maps in a space time dataset.
• t.remove(1grass) Removes space time datasets from temporal database.
• t.rename(1grass) Renames a space time dataset
• t.sample(1grass) Samples the input space time dataset(s) with a sample space time dataset and print the result to stdout.
• t.select(1grass) Select maps from space time datasets by topological relationships to other space time datasets using temporal algebra.
• t.shift(1grass) Shifts temporally the maps of a space time dataset.
• t.snap(1grass) Snaps temporally the maps of a space time dataset.
• t.support(1grass) Modifies the metadata of a space time dataset.
• t.topology(1grass) Lists temporal topology of a space time dataset.
• t.unregister(1grass) Unregisters raster, vector and raster3d maps from the temporal database or a specific space time dataset.
• t.upgrade(1grass) Upgrades the version of the temporal database.
• t.vect.algebra(1grass) Apply temporal and spatial operations on space time vector datasets using temporal vector algebra.
• t.vect.db.select(1grass) Prints attributes of vector maps registered in a space time vector dataset.
• t.vect.export(1grass) Exports a space time vector dataset as GRASS GIS specific archive file.
• t.vect.extract(1grass) Extracts a subset of a space time vector dataset.
• t.vect.import(1grass) Imports a space time vector dataset from a GRASS GIS specific archive file.
• t.vect.list(1grass) Lists registered maps of a space time vector dataset.
• t.vect.observe.strds(1grass) Observes specific locations in a space time raster dataset over a period of time using vector points.
• t.vect.univar(1grass) Calculates univariate statistics of attributes for each registered vector map of a space time vector dataset
• t.vect.what.strds(1grass) Stores raster map values at spatial and temporal positions of vector points as vector attributes.
• temporal(1grass)
• temporal_graphical(1grass)
• temporalintro(1grass)
• test.r3flow(1grass) Testing flow lines.
• test.raster3d.lib(1grass) Performs unit and integration tests for the raster3d library
• topic_ACCA(1grass)
• topic_accumulation(1grass)
• topic_aggregation(1grass)
• topic_albedo(1grass)
• topic_algebra(1grass)
• topic_atmospheric_correction(1grass)
• topic_attribute_table(1grass)
• topic_biomass(1grass)
• topic_buffer(1grass)
• topic_cartography(1grass)
• topic_category(1grass)
• topic_centroid(1grass)
• topic_classification(1grass)
• topic_clip(1grass)
• topic_color_table(1grass)
• topic_color_transformation(1grass)
• topic_composite(1grass)
• topic_connection_settings(1grass)
• topic_contour(1grass)
• topic_conversion(1grass)
• topic_copy(1grass)
• topic_cost_surface(1grass)
• topic_data(1grass)
• topic_diagram(1grass)
• topic_display(1grass)
• topic_dissolve(1grass)
• topic_distance(1grass)
• topic_edges(1grass)
• topic_editing(1grass)
• topic_elevation(1grass)
• topic_emissivity(1grass)
• topic_energy_balance(1grass)
• topic_evapotranspiration(1grass)
• topic_export(1grass)
• topic_extract(1grass)
• topic_fire(1grass)
• topic_fusion(1grass)
• topic_generalization(1grass)
• topic_geometry(1grass)
• topic_geomorphology(1grass)
• topic_geomorphons(1grass)
• topic_gradient(1grass)
• topic_graphics(1grass)
• topic_groundwater_flow(1grass)
• topic_GUI(1grass)
• topic_histogram(1grass)
• topic_hydrology(1grass)
• topic_imagery(1grass)
• topic_imagery_quality_assessment(1grass)
• topic_import(1grass)
• topic_installation(1grass)
• topic_interpolation(1grass)
• topic_kernel_density(1grass)
• topic_landscape_structure_analysis(1grass)
• topic_latitude(1grass)
• topic_LIDAR(1grass)
• topic_linear_reference_system(1grass)
• topic_manual(1grass)
• topic_map_annotations(1grass)
• topic_map_management(1grass)
• topic_mask(1grass)
• topic_measurement(1grass)
• topic_metadata(1grass)
• topic_modules(1grass)
• topic_mosaic(1grass)
• topic_multispectral(1grass)
• topic_network(1grass)
• topic_orthorectify(1grass)
• topic_paint_labels(1grass)
• topic_point_cloud(1grass)
• topic_printing(1grass)
• topic_profile(1grass)
• topic_projection(1grass)
• topic_querying(1grass)
• topic_radiometric_conversion(1grass)
• topic_raster(1grass)
• topic_reclassification(1grass)
• topic_recode_categories(1grass)
• topic_rectify(1grass)
• topic_resample(1grass)
• topic_rescale(1grass)
• topic_RGB(1grass)
• topic_sampling(1grass)
• topic_segmentation(1grass)
• topic_series(1grass)
• topic_settings(1grass)
• topic_solar(1grass)
• topic_statistics(1grass)
• topic_support(1grass)
• topic_surface(1grass)
• topic_temporal(1grass)
• topic_terrain(1grass)
• topic_tiling(1grass)
• topic_time_management(1grass)
• topic_topology(1grass)
• topic_transformation(1grass)
• topic_unit_test(1grass)
• topic_vector(1grass)
• topic_vegetation_index(1grass)
• topic_viewshed(1grass)
• topic_visualization(1grass)
• topic_volume(1grass)
• topic_voxel(1grass)
• topics(1grass)
• v.buffer(1grass) Creates a buffer around vector features of given type.
• v.build(1grass) Creates topology for vector map.
• v.build.all(1grass) Rebuilds topology on all vector maps in the current mapset.
• v.build.polylines(1grass) Builds polylines from lines or boundaries.
• v.category(1grass) Attaches, deletes or reports vector categories to/from/of map geometry.
• v.centroids(1grass) Adds missing centroids to closed boundaries.
• v.class(1grass) Classifies attribute data, e.g. for thematic mapping
• v.clean(1grass) Toolset for cleaning topology of vector map.
• v.clip(1grass) Extracts features of input map which overlay features of clip map.
• v.cluster(1grass) Performs cluster identification.
• v.colors(1grass) Creates/modifies the color table associated with a vector map.
• v.colors.out(1grass) Exports the color table associated with a vector map.
• v.db.addcolumn(1grass) Adds one or more columns to the attribute table connected to a given vector map.
• v.db.addtable(1grass) Creates and connects a new attribute table to a given layer of an existing vector map.
• v.db.connect(1grass) Prints/sets DB connection for a vector map to attribute table.
• v.db.dropcolumn(1grass) Drops a column from the attribute table connected to a given vector map.
• v.db.droprow(1grass) Removes a vector feature from a vector map through attribute selection.
• v.db.droptable(1grass) Removes existing attribute table of a vector map.
• v.db.join(1grass) Joins a database table to a vector map table.
• v.db.reconnect.all(1grass) Reconnects attribute tables for all vector maps from the current mapset to a new database.
• v.db.renamecolumn(1grass) Renames a column in the attribute table connected to a given vector map.
• v.db.select(1grass) Prints vector map attributes.
• v.db.univar(1grass) Calculates univariate statistics on selected table column for a GRASS vector map.
• v.db.update(1grass) Updates a column in the attribute table connected to a vector map.
• v.decimate(1grass) Decimates a point cloud
• v.delaunay(1grass) Creates a Delaunay triangulation from an input vector map containing points or centroids.
• v.dissolve(1grass) Dissolves boundaries between adjacent areas sharing a common category number or attribute.
• v.distance(1grass) Finds the nearest element in vector map ’to’ for elements in vector map ’from’.
• v.drape(1grass) Converts 2D vector features to 3D by sampling of elevation raster map.
• v.edit(1grass) Edits a vector map, allows adding, deleting and modifying selected vector features.
• v.external(1grass) Creates a new pseudo-vector map as a link to an OGR-supported layer or a PostGIS feature table.
• v.external.out(1grass) Defines vector output format.
• v.extract(1grass) Selects vector features from an existing vector map and creates a new vector map containing only the selected features.
• v.extrude(1grass) Extrudes flat vector features to 3D vector features with defined height.
• v.generalize(1grass) Performs vector based generalization.
• v.hull(1grass) Produces a 2D/3D convex hull for a given vector map.
• v.import(1grass) Imports vector data into a GRASS vector map using OGR library and reprojects on the fly.
• v.in.ascii(1grass) Creates a vector map from an ASCII points file or ASCII vector file.
• v.in.db(1grass) Creates new vector (points) map from database table containing coordinates.
• v.in.dxf(1grass) Converts file in DXF format to GRASS vector map.
• v.in.e00(1grass) Imports E00 file into a vector map.
• v.in.geonames(1grass) Imports geonames.org country files into a vector points map.
• v.in.lines(1grass) Imports ASCII x, y[, z] coordinates as a series of lines.
• v.in.mapgen(1grass) Imports Mapgen or Matlab-ASCII vector maps into GRASS.
• v.in.ogr(1grass) Imports vector data into a GRASS vector map using OGR library.
• v.in.region(1grass) Creates a vector polygon from the current region extent.
• v.in.wfs(1grass) Imports GetFeature from a WFS server.
• v.info(1grass) Outputs basic information about a vector map.
• v.kcv(1grass) Randomly partition points into test/train sets.
• v.kernel(1grass) Generates a raster density map from vector points map.
• v.label(1grass) Creates paint labels for a vector map from attached attributes.
• v.label.sa(1grass) Create optimally placed labels for vector map(s)
• v.lidar.correction(1grass) Corrects the v.lidar.growing output. It is the last of the three algorithms for LIDAR filtering.
• v.lidar.edgedetection(1grass) Detects the object’s edges from a LIDAR data set.
• v.lidar.growing(1grass) Building contour determination and Region Growing algorithm for determining the building inside
• v.lrs.create(1grass) Creates a linear reference system.
• v.lrs.label(1grass) Creates stationing from input lines, and linear reference system.
• v.lrs.segment(1grass) Creates points/segments from input lines, linear reference system and positions read from stdin or a file.
• v.lrs.where(1grass) Finds line id and real km+offset for given points in vector map using linear reference system.
• v.mkgrid(1grass) Creates a vector map of a user-defined grid.
• v.neighbors(1grass) Neighborhood analysis tool for vector point maps.
• v.net(1grass) Performs network maintenance.
• v.net.alloc(1grass) Allocates subnets for nearest centers.
• v.net.allpairs(1grass) Computes the shortest path between all pairs of nodes in the network.
• v.net.bridge(1grass) Computes bridges and articulation points in the network.
• v.net.centrality(1grass) Computes degree, centrality, betweeness, closeness and eigenvector centrality measures in the network.
• v.net.components(1grass) Computes strongly and weakly connected components in the network.
• v.net.connectivity(1grass) Computes vertex connectivity between two sets of nodes in the network.
• v.net.distance(1grass) Computes shortest distance via the network between the given sets of features.
• v.net.flow(1grass) Computes the maximum flow between two sets of nodes in the network.
• v.net.iso(1grass) Splits subnets for nearest centers by cost isolines.
• v.net.path(1grass) Finds shortest path on vector network.
• v.net.salesman(1grass) Creates a cycle connecting given nodes (Traveling salesman problem).
• v.net.spanningtree(1grass) Computes minimum spanning tree for the network.
• v.net.steiner(1grass) Creates Steiner tree for the network and given terminals.
• v.net.timetable(1grass) Finds shortest path using timetables.
• v.net.visibility(1grass) Performs visibility graph construction.
• v.normal(1grass) Tests for normality for vector points.
• v.out.ascii(1grass) Exports a vector map to a GRASS ASCII vector representation.
• v.out.dxf(1grass) Exports vector map to DXF file format.
• v.out.ogr(1grass) Exports a vector map layer to any of the supported OGR vector formats.
• v.out.postgis(1grass) Exports a vector map layer to PostGIS feature table.
• v.out.pov(1grass) Converts GRASS x, y, z points to POV-Ray x, z, y format.
• v.out.svg(1grass) Exports a vector map to SVG file.
• v.out.vtk(1grass) Converts a vector map to VTK ASCII output.
• v.outlier(1grass) Removes outliers from vector point data.
• v.overlay(1grass) Overlays two vector maps offering clip, intersection, difference, symmetrical difference, union operators.
• v.pack(1grass) Exports a vector map as GRASS GIS specific archive file
• v.parallel(1grass) Creates parallel line to input vector lines.
• v.patch(1grass) Creates a new vector map by combining other vector maps.
• v.perturb(1grass) Random location perturbations of vector points.
• v.profile(1grass) Vector map profiling tool
• v.proj(1grass) Re-projects a vector map from one location to the current location.
• v.qcount(1grass) Indices for quadrat counts of vector point lists.
• v.random(1grass) Generates random 2D/3D vector points.
• v.rast.stats(1grass) Calculates univariate statistics from a raster map based on a vector map and uploads statistics to new attribute columns.
• v.reclass(1grass) Changes vector category values for an existing vector map according to results of SQL queries or a value in attribute table column.
• v.rectify(1grass) Rectifies a vector by computing a coordinate transformation for each object in the vector based on the control points.
• v.report(1grass) Reports geometry statistics for vector maps.
• v.sample(1grass) Samples a raster map at vector point locations.
• v.segment(1grass) Creates points/segments from input vector lines and positions.
• v.select(1grass) Selects features from vector map (A) by features from other vector map (B).
• v.split(1grass) Splits vector lines to shorter segments.
• v.support(1grass) Updates vector map metadata.
• v.surf.bspline(1grass) Performs bicubic or bilinear spline interpolation with Tykhonov regularization.
• v.surf.idw(1grass) Provides surface interpolation from vector point data by Inverse Distance Squared Weighting.
• v.surf.rst(1grass) Performs surface interpolation from vector points map by splines.
• v.timestamp(1grass) Modifies a timestamp for a vector map.
• v.to.3d(1grass) Performs transformation of 2D vector features to 3D.
• v.to.db(1grass) Populates attribute values from vector features.
• v.to.lines(1grass) Converts vector polygons or points to lines.
• v.to.points(1grass) Creates points along input lines in new vector map with 2 layers.
• v.to.rast(1grass) Converts (rasterize) a vector map into a raster map.
• v.to.rast3(1grass) Converts a vector map (only points) into a 3D raster map.
• v.transform(1grass) Performs an affine transformation (shift, scale and rotate) on vector map.
• v.type(1grass) Changes type of vector features.
• v.univar(1grass) Calculates univariate statistics of vector map features.
• v.unpack(1grass) Imports a GRASS GIS specific vector archive file (packed with v.pack) as a vector map
• v.vect.stats(1grass) Count points in areas, calculate statistics from point attributes.
• v.vol.rst(1grass) Interpolates point data to a 3D raster map using regularized spline with tension (RST) algorithm.
• v.voronoi(1grass) Creates a Voronoi diagram constrained to the extents of the current region from an input vector map containing points or centroids.
• v.what(1grass) Queries a vector map at given locations.
• v.what.rast(1grass) Uploads raster values at positions of vector points to the table.
• v.what.rast3(1grass) Uploads 3D raster values at positions of vector points to the table.
• v.what.strds(1grass) Uploads space time raster dataset values at positions of vector points to the table.
• v.what.vect(1grass) Uploads vector values at positions of vector points to the table.
• variables(1grass)
• vector(1grass)
• vector_graphical(1grass)
• vectorascii(1grass)
• vectorintro(1grass)
• wxGUI(1grass)
• wxGUI.animation(1grass)
• wxGUI.components(1grass)
• wxGUI.datacatalog(1grass)
• wxGUI.dbmgr(1grass)
• wxGUI.gcp(1grass)
• wxGUI.gmodeler(1grass)
• wxGUI.iclass(1grass)
• wxGUI.image2target(1grass)
• wxGUI.iscatt(1grass)
• wxGUI.mapswipe(1grass)
• wxGUI.modules(1grass)
• wxGUI.nviz(1grass)
• wxGUI.photo2image(1grass)
• wxGUI.psmap(1grass)
• wxGUI.rdigit(1grass)
• wxGUI.rlisetup(1grass)
• wxGUI.timeline(1grass)
• wxGUI.toolboxes(1grass)
• wxGUI.tplot(1grass)
• wxGUI.vdigit(1grass)
• wxGUI.vnet(1grass)
• wxGUI_graphical(1grass)
• wxpyimgview(1grass) Views BMP images from the PNG driver.
• ximgview(1grass) View BMP images from the PNG driver.