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Graphical index of GRASS GIS modules

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   Imagery modules:
           •   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.band.library  Prints available semantic label information used for multispectral
               data.

           •   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.init  Interactively  creates  or  modifies  entries  in  a  camera initial
               exposure station file for imagery group referenced by a sub-block.

           •   i.ortho.photo Menu driver for the photo imagery programs.

           •   i.ortho.rectify Orthorectifies an image by using the  image  to  photo  coordinate
               transformation matrix.

           •   i.ortho.target Select or modify the imagery group target.

           •   i.ortho.transform  Computes  a  coordinate  transformation  based  on  the control
               points.

           •   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.

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