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Graphical index of GRASS GIS modules

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   Raster modules:
           •   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.buildvrt Build a VRT (Virtual Raster) from the list of input raster maps.

           •   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 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.fill.stats  Rapidly  fills  ’no  data’  cells  (NULLs)  of  a  raster  map  with
               interpolated values (IDW).

           •   r.fillnulls Fills no-data areas in raster maps using spline interpolation.

           •   r.flow Constructs flowlines.

           •   r.geomorphon  Calculates geomorphons (terrain forms) and associated geometry using
               machine vision approach.

           •   r.grow.distance Generates a raster map  containing  distances  to  nearest  raster
               features and/or the value of the nearest non-null cell.

           •   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.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 OGC WMS and OGC WMTS web mapping servers.

           •   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.mapcalc.simple Calculates a new raster map from a simple r.mapcalc expression.

           •   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.object.geometry Calculates geometry parameters for raster objects.

           •   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.path Traces paths from starting points following input directions.

           •   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 randomly placed raster cells or vector 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.semantic.label Manages semantic label information assigned to  a  single  raster
               map or to a list of 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.

           •   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.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 GRASS GIS specific raster archive file (packed with r.pack)  as
               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.

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