GRASS GIS - Capabilities page
GRASS GIS - Capabilities pageGRASS GIS is a fully featured Geographic Information System. It supports raster, vector and point data analysis.
GRASS accepts a variety of raster and some vector dataformats - most of the raster formats are equal to standard image formats (8/24 bit as well as negative values). Check the Info-Sheets or the documentation for details. The following table shows an overview of the features integrated in GRASS GIS.
Main topic
|
Modules
|
| Raster
analysis
|
Automatic
rasterline and area to vector conversion
|
| Buffering
of line structures
| |
| Cell
and profile dataquery
| |
| Colortable
modifications
| |
| Conversion
to vector and point data format
| |
| Correlation
/ covariance analysis
| |
| Expert
system analysis
| |
| Map algebra (map calculator)
| |
| Interpolation
for missing values
| |
| Neighbourhood
matrix analysis
| |
| Raster
overlay with or without weight
| |
| Reclassification
of cell labels
| |
| Resampling
(resolution)
| |
| Rescaling
of cell values
| |
| Statistical
cell analysis
| |
| Surface
generation from vector lines
| |
| Vector
analysis
|
Contour
generation from rastersurface
|
| Conversion
to raster and point data format
| |
| Digitizing
with board or on screen (scanned rasterimage) with mouse
| |
| Reclassification
of vector labels
| |
| Superpositioning
of vector layers
| |
| Point
data analysis
|
Delaunay
triangulation
|
| Surface
interpolation from spot heights
| |
| Thiessen
polygons
| |
| Topographic
analysis (curvature, slope, aspect)
| |
| Image
processing
|
Canonical
component analysis (CCA)
|
| Color
composite generation
| |
| Edge
detection
| |
| Frequency
filtering (Fourier, convolution matrices)
| |
| Fourier
and inverse fourier transformation
| |
| Histogram
stretching
| |
| IHS
transformation to RGB
| |
| Image
rectification (affine and polynomial transformations on raster and vector
targets)
| |
| Ortho
photo rectification
| |
| Principal
component analysis (PCA)
| |
| Radiometric
corrections (Fourier)
| |
| Resampling
| |
| Resolution
enhancement (with RGB/IHS)
| |
| RGB
to IHS transformation
| |
| Texture
oriented classification (sequential maximum a posteriori classification)
| |
| Shape
detection
| |
| Supervised
classification (training areas, maximum likelihood classification)
| |
| Unsupervised
classification (minimum distance clustering, maximum likelihood classification)
| |
| DTM-Analysis
|
Contour
generation
|
| Cost
/ path analysis
| |
| Slope
/ aspect analysis
| |
| Surface
generation from spot heigths or contours
| |
| Screen
displaying
|
3D
surfaces
|
| Color
assignments
| |
| Histogram
presentation
| |
| Map
overlay
| |
| Point
data maps
| |
| Raster
maps
| |
| Vector
maps
| |
| Zoom
/ unzoom -function
| |
| Map
creation
|
PPM-image
maps
|
| Postscript
maps
| |
| Extra
modules
|
Database
interfaces (Informix, Ingres, PostgreSQL)
|
| (several
other modules are available)
|
Erosion
modelling (AGNPS, ANSWERS)
|
| Landscape
structure analysis
| |
| Solution
transport
| |
| Watershed
analysis
|
Here is a detailed page about the integration
of simulation models.
Click here for a list of the modules
included in the GRASS Linux binary package (the source code offers some more
modules).
GRASS Development Team