GRASS 5.0 - Capabilities page
GRASS 5.0 - Capabilities pageGRASS 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 introduction or the documentation for details. The following table gives 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 | |
| 3D-Raster (voxel) analysis | 3D data import (intuitive ASCII: x y z Format) |
| 3D masks | |
| 3D map algebra (r3.mapcalc) | |
| 3D interpolation (IDW, Regularised Splines with Tension) | |
| 3D Visualization (isosurfaces) | |
| Interface to Vis5D visualization tool | |
| Vector analysis | Contour generation from raster surfaces (IDW, Spline algorithm) |
| Conversion to raster and point data format | |
| Digitizing with board or on screen (scanned raster image) 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 | |
| Visualization | 3D surfaces with 3D query (NVIZ) |
| Color assignments | |
| Histogram presentation | |
| Map overlay | |
| Point data maps | |
| Raster maps | |
| Vector maps | |
| Zoom / unzoom -function | |
| Map creation | PPM-image maps |
| Postscript maps | |
| HTML maps | |
| SQL-support | Database interfaces (ODBC, PostgreSQL) |
| Other modules | Erosion modelling (AGNPS 5, ANSWERS, TOPMODEL) |
| Landscape structure analysis | |
| Solution transport | |
| Watershed analysis | |
| Geostatistics | Interface to "R" (GNU S) (a statistical analysis environment) |
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).