1raster(1) GRASS GIS User's Manual raster(1)
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6 Geographic Resources Analysis Support System, commonly referred to as
7 GRASS GIS, is a Geographic Information System (GIS) used for geospatial
8 data management and analysis, image processing, graphics/maps produc‐
9 tion, spatial modeling, and visualization. GRASS is currently used in
10 academic and commercial settings around the world, as well as by many
11 governmental agencies and environmental consulting companies.
12 This reference manual details the use of modules distributed with Geo‐
14 graphic Resources Analysis Support System (GRASS), an open source (GNU
15 GPLed), image processing and geographic information system (GIS). Go
16 to raster introduction | topics
17 Go back to help overview
19 Raster commands:
21 r.basins.fill Generates watershed subbasins raster map.
22 r.blend Blends color components of two raster maps by a given ratio.
24 r.buffer Creates a raster map showing buffer zones surrounding cells
26 that contain non-NULL category values.
27 r.buffer.lowmem Creates a raster map showing buffer zones surrounding cells
29 that contain non-NULL category values.
30 r.buildvrt Build a VRT (Virtual Raster) from the list of input raster
32 maps.
33 r.carve Generates stream channels.
35 r.category Manages category values and labels associated with
37 user-specified raster map layers.
38 r.circle Creates a raster map containing concentric rings around a
40 given point.
41 r.clump Recategorizes data in a raster map by grouping cells that
43 form physically discrete areas into unique categories.
44 r.coin Tabulates the mutual occurrence (coincidence) of categories
46 for two raster map layers.
47 r.colors Creates/modifies the color table associated with a raster
49 map.
50 r.colors.out Exports the color table associated with a raster map.
52 r.colors.stddev Sets color rules based on stddev from a raster map’s mean
54 value.
55 r.composite Combines red, green and blue raster maps into a single com‐
57 posite raster map.
58 r.compress Compresses and decompresses raster maps.
60 r.contour Produces a vector map of specified contours from a raster
62 map.
63 r.cost Creates a raster map showing the cumulative cost of moving
69 between different geographic locations on an input raster
70 map whose cell category values represent cost.
71 r.covar Outputs a covariance/correlation matrix for user-specified
73 raster map layer(s).
74 r.cross Creates a cross product of the category values from multiple
76 raster map layers.
77 r.describe Prints terse list of category values found in a raster map
79 layer.
80 r.distance Locates the closest points between objects in two raster
82 maps.
83 r.drain Traces a flow through an elevation model or cost surface on
85 a raster map.
86 r.external Links GDAL supported raster data as a pseudo GRASS raster
88 map.
89 r.external.out Redirects raster output to file utilizing GDAL library
91 rather than storing in GRASS raster format.
92 r.fill.dir Filters and generates a depressionless elevation map and a
94 flow direction map from a given elevation raster map.
95 r.fill.stats Rapidly fills ’no data’ cells (NULLs) of a raster map with
97 interpolated values (IDW).
98 r.fillnulls Fills no-data areas in raster maps using spline interpola‐
100 tion.
101 r.flow Constructs flowlines.
103 r.geomorphon Calculates geomorphons (terrain forms) and associated geome‐
105 try using machine vision approach.
106 r.grow.distance Generates a raster map containing distances to nearest
108 raster features and/or the value of the nearest non-null
109 cell.
110 r.grow Generates a raster map layer with contiguous areas grown by
112 one cell.
113 r.gwflow Numerical calculation program for transient, confined and
115 unconfined groundwater flow in two dimensions.
116 r.his Generates red, green and blue (RGB) raster map layers com‐
118 bining hue, intensity and saturation (HIS) values from
119 user-specified input raster map layers.
120 r.horizon Computes horizon angle height from a digital elevation
122 model.
123 r.import Imports raster data into a GRASS raster map using GDAL li‐
125 brary and reprojects on the fly.
126 r.in.ascii Converts a GRASS ASCII raster file to binary raster map.
128 r.in.aster Georeference, rectify, and import Terra-ASTER imagery and
130 relative DEMs using gdalwarp.
131 r.in.bin Import a binary raster file into a GRASS raster map layer.
135 r.in.gdal Imports raster data into a GRASS raster map using GDAL li‐
137 brary.
138 r.in.gridatb Imports GRIDATB.FOR map file (TOPMODEL) into a GRASS raster
140 map.
141 r.in.mat Imports a binary MAT-File(v4) to a GRASS raster.
143 r.in.pdal Creates a raster map from LAS LiDAR points using univariate
145 statistics.
146 r.in.png Imports non-georeferenced PNG format image.
148 r.in.poly Creates raster maps from ASCII polygon/line/point data
150 files.
151 r.in.srtm Imports SRTM HGT files into raster map.
153 r.in.wms Downloads and imports data from OGC WMS and OGC WMTS web
155 mapping servers.
156 r.in.xyz Creates a raster map from an assemblage of many coordinates
158 using univariate statistics.
159 r.info Outputs basic information about a raster map.
161 r.kappa Calculates error matrix and kappa parameter for accuracy as‐
163 sessment of classification result.
164 r.lake Fills lake at given point to given level.
166 r.latlong Creates a latitude/longitude raster map.
168 r.li.cwed Calculates contrast weighted edge density index on a raster
170 map
171 r.li.daemon Support module for r.li landscape index calculations.
173 r.li.dominance Calculates dominance’s diversity index on a raster map
175 r.li.edgedensity Calculates edge density index on a raster map, using a 4
177 neighbour algorithm
178 r.li Toolset for multiscale analysis of landscape structure
180 r.li.mpa Calculates mean pixel attribute index on a raster map
182 r.li.mps Calculates mean patch size index on a raster map, using a 4
184 neighbour algorithm
185 r.li.padcv Calculates coefficient of variation of patch area on a
187 raster map
188 r.li.padrange Calculates range of patch area size on a raster map
190 r.li.padsd Calculates standard deviation of patch area a raster map
192 r.li.patchdensity Calculates patch density index on a raster map, using a 4
194 neighbour algorithm
195 r.li.patchnum Calculates patch number index on a raster map, using a 4
197 neighbour algorithm.
198 r.li.pielou Calculates Pielou’s diversity index on a raster map
201 r.li.renyi Calculates Renyi’s diversity index on a raster map
203 r.li.richness Calculates richness index on a raster map
205 r.li.shannon Calculates Shannon’s diversity index on a raster map
207 r.li.shape Calculates shape index on a raster map
209 r.li.simpson Calculates Simpson’s diversity index on a raster map
211 r.mapcalc Raster map calculator.
213 r.mapcalc.simple Calculates a new raster map from a simple r.mapcalc expres‐
215 sion.
216 r.mask Creates a MASK for limiting raster operation.
218 r.mfilter Performs raster map matrix filter.
220 r.mode Finds the mode of values in a cover map within areas as‐
222 signed the same category value in a user-specified base map.
223 r.neighbors Makes each cell category value a function of the category
225 values assigned to the cells around it, and stores new cell
226 values in an output raster map layer.
227 r.null Manages NULL-values of given raster map.
229 r.object.geometry Calculates geometry parameters for raster objects.
231 r.out.ascii Converts a raster map layer into a GRASS ASCII text file.
233 r.out.bin Exports a GRASS raster to a binary array.
235 r.out.gdal Exports GRASS raster maps into GDAL supported formats.
237 r.out.gridatb Exports GRASS raster map to GRIDATB.FOR map file (TOPMODEL).
239 r.out.mat Exports a GRASS raster to a binary MAT-File.
241 r.out.mpeg Converts raster map series to MPEG movie.
243 r.out.png Export a GRASS raster map as a non-georeferenced PNG image.
245 r.out.pov Converts a raster map layer into a height-field file for
247 POV-Ray.
248 r.out.ppm Converts a GRASS raster map to a PPM image file.
250 r.out.ppm3 Converts 3 GRASS raster layers (R,G,B) to a PPM image file.
252 r.out.vrml Exports a raster map to the Virtual Reality Modeling Lan‐
254 guage (VRML).
255 r.out.vtk Converts raster maps into the VTK-ASCII format.
257 r.out.xyz Exports a raster map to a text file as x,y,z values based on
259 cell centers.
260 r.pack Exports a raster map as GRASS GIS specific archive file
262 r.param.scale Extracts terrain parameters from a DEM.
264 r.patch Creates a composite raster map layer by using known category
267 values from one (or more) map layer(s) to fill in areas of
268 "no data" in another map layer.
269 r.path Traces paths from starting points following input direc‐
271 tions.
272 r.plane Creates raster plane map given dip (inclination), aspect
274 (azimuth) and one point.
275 r.profile Outputs the raster map layer values lying on user-defined
277 line(s).
278 r.proj Re-projects a raster map from given location to the current
280 location.
281 r.quant Produces the quantization file for a floating-point map.
283 r.quantile Compute quantiles using two passes.
285 r.random.cells Generates random cell values with spatial dependence.
287 r.random Creates randomly placed raster cells or vector points
289 r.random.surface Generates random surface(s) with spatial dependence.
291 r.reclass.area Reclasses a raster map greater or less than user specified
293 area size (in hectares).
294 r.reclass Reclassify raster map based on category values.
296 r.recode Recodes categorical raster maps.
298 r.region Sets the boundary definitions for a raster map.
300 r.regression.line Calculates linear regression from two raster maps: y = a +
302 b*x.
303 r.regression.multi Calculates multiple linear regression from raster maps.
305 r.relief Creates shaded relief map from an elevation map (DEM).
307 r.report Reports statistics for raster maps.
309 r.resamp.bspline Performs bilinear or bicubic spline interpolation with
311 Tykhonov regularization.
312 r.resamp.filter Resamples raster map layers using an analytic kernel.
314 r.resamp.interp Resamples raster map to a finer grid using interpolation.
316 r.resamp.rst Reinterpolates and optionally computes topographic analysis
318 from input raster map to a new raster map (possibly with
319 different resolution) using regularized spline with tension
320 and smoothing.
321 r.resamp.stats Resamples raster map layers to a coarser grid using aggrega‐
323 tion.
324 r.resample GRASS raster map layer data resampling capability.
326 r.rescale.eq Rescales histogram equalized the range of category values in
328 a raster map layer.
329 r.rescale Rescales the range of category values in a raster map layer.
333 r.rgb Splits a raster map into red, green and blue maps.
335 r.ros Generates rate of spread raster maps.
337 r.semantic.label Manages semantic label information assigned to a single
339 raster map or to a list of raster maps.
340 r.series.accumulate Makes each output cell value a accumulationfunction of the
342 values assigned to the corresponding cells in the input
343 raster map layers.
344 r.series Makes each output cell value a function of the values as‐
346 signed to the corresponding cells in the input raster map
347 layers.
348 r.series.interp Interpolates raster maps located (temporal or spatial) in
350 between input raster maps at specific sampling positions.
351 r.shade Drapes a color raster over an shaded relief or aspect map.
353 r.sim.sediment Sediment transport and erosion/deposition simulation using
355 path sampling method (SIMWE).
356 r.sim.water Overland flow hydrologic simulation using path sampling
358 method (SIMWE).
359 r.slope.aspect Generates raster maps of slope, aspect, curvatures and par‐
361 tial derivatives from an elevation raster map.
362 r.solute.transport Numerical calculation program for transient, confined and
364 unconfined solute transport in two dimensions
365 r.spread Simulates elliptically anisotropic spread.
367 r.spreadpath Recursively traces the least cost path backwards to cells
369 from which the cumulative cost was determined.
370 r.statistics Calculates category or object oriented statistics.
372 r.stats Generates area statistics for raster map.
374 r.stats.quantile Compute category quantiles using two passes.
376 r.stats.zonal Calculates category or object oriented statistics (accumula‐
378 tor-based statistics).
379 r.stream.extract Performs stream network extraction.
381 r.sun Solar irradiance and irradiation model.
383 r.sunhours Calculates solar elevation, solar azimuth, and sun hours.
385 r.sunmask Calculates cast shadow areas from sun position and elevation
387 raster map.
388 r.support Allows creation and/or modification of raster map layer sup‐
390 port files.
391 r.support.stats Update raster map statistics
393 r.surf.area Prints estimation of surface area for raster map.
395 r.surf.contour Generates surface raster map from rasterized contours.
399 r.surf.fractal Creates a fractal surface of a given fractal dimension.
401 r.surf.gauss Generates a raster map using gaussian random number genera‐
403 tor.
404 r.surf.idw Provides surface interpolation from raster point data by In‐
406 verse Distance Squared Weighting.
407 r.surf.random Produces a raster surface map of uniform random deviates
409 with defined range.
410 r.terraflow Performs flow computation for massive grids.
412 r.texture Generate images with textural features from a raster map.
414 r.thin Thins non-null cells that denote linear features in a raster
416 map layer.
417 r.tile Splits a raster map into tiles.
419 r.tileset Produces tilings of the source projection for use in the
421 destination region and projection.
422 r.timestamp Modifies a timestamp for a raster map.
424 r.to.rast3 Converts 2D raster map slices to one 3D raster volume map.
426 r.to.rast3elev Creates a 3D volume map based on 2D elevation and value
428 raster maps.
429 r.to.vect Converts a raster map into a vector map.
431 r.topidx Creates a topographic index (wetness index) raster map from
433 an elevation raster map.
434 r.topmodel Simulates TOPMODEL which is a physically based hydrologic
436 model.
437 r.transect Outputs raster map layer values lying along user defined
439 transect line(s).
440 r.univar Calculates univariate statistics from the non-null cells of
442 a raster map.
443 r.unpack Imports a GRASS GIS specific raster archive file (packed
445 with r.pack) as a raster map
446 r.uslek Computes USLE Soil Erodibility Factor (K).
448 r.usler Computes USLE R factor, Rainfall erosivity index.
450 r.viewshed Computes the viewshed of a point on an elevation raster map.
452 r.volume Calculates the volume of data "clumps".
454 r.walk Creates a raster map showing the anisotropic cumulative cost
456 of moving between different geographic locations on an input
457 raster map whose cell category values represent cost.
458 r.water.outlet Creates watershed basins from a drainage direction map.
460 r.watershed Calculates hydrological parameters and RUSLE factors.
462 r.what.color Queries colors for a raster map layer.
465 r.what Queries raster maps on their category values and category
467 labels.
468 Main index | Topics index | Keywords index | Graphical index | Full in‐
471 dex
472 © 2003-2023 GRASS Development Team, GRASS GIS 8.2.1 Reference Manual
474GRASS 8.2.1 raster(1)