As well as GRASS complements Quantum GIS, SEXTANTE does the same with gvSIG, keeping the specialty. These are the best efforts of collaboration between open source alternatives in the geospatial environment, searching to prevent unnecessary duplication.
The gvSIG effort of maintaining vector handling with many CAD capabilities is complemented with everything that has been built in SEXTANTE after its abandon its approach merely raster with SAGA and become a library so many other GIS programs implemented and extend it to the vector approach. Here I show you the list of about 240 algorithms that exist for gvSIG 1.9:
- Patterns Analysis
-Diversity
-Dominance
-Fragmentation
-Number of classes
-Different
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- Basic hydrological analysis
-Flow collection
-Watersheds
-Watersheds by size
-Slope-basin into a zone
-Slope-basin to a given point
-Eliminate depressions
-Drainage System
-Time out
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- Costs, distances and routes
-Accumulated Cost (anisotropic)
– Accumulated Cost (anisotropic)(B)
– Accumulated Cost (combined)
– Accumulated Cost (isotropic)
-Cost per predefined path
-Cost per predefined path (anisotropic)
-Cost per predefined path (anisotropic) (B)
– Generating alternative routes
– Polar to Rectangular
– Minimum-cost route
– Sum of costs to all points
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- Statistics for multilayered raster cell
– Asymmetry
– Maximum Layer value
– Minimum Layer value
-Count equal to
-Count greater than
-Kurtosis
-Max
-Majority
-Average
-Medium
-Minimum
-Minority
-Range
-Variance
- Geostatistics
– Variance-Radio
– Semivariance (raster)
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- Geomorfometry relief analysis
– Real Area
– Classification of landforms
– Anisotropic coefficient of variation
– Curvatures
– Hypsometry
– Lift-Index – relief
– Protection Index
– Orientation
– Slope
- Tool Analysis for raster layers
– Change Vector Analysis
– Unsupervised classification (clustering)
– Supervised classification
– Supervised classification (B)
– ROC Curve
– Analytical Hierarchy (AHP)
– Predictive models
-Ordered Weighted Averaging (OWA)
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- Basic tools for raster layers
-Add
– Fit to extension with valid data
– Calculation of volumes
– Change data type
-Complete grid
– Correlation between layers
– Cut raster layer with polygon
– Basic statistics
– Filter 3 x 3 user defined
– Histogram
– Invert mask
– Gradient lines
– Locate peaks
– Normalize
-Order
– Flip / invest
– Fill cells with no data
– Fill cells with no data (neighborhood)
– Merge Layers
– Volumes between two layers
- Calculation Tools for raster layers
– Maps-Calculator
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- Tools for layer lines
– Convert lines of equally spaced dots
– Convert lines in single segments
– Convert polylines to polygons
– Fragment layer lines with points
– Line Invest sense
– Directional Media
– Sampling ends of lines
– Property geometric lines
– Separate strings in nodes
-Simplify lines
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- Tools for polygons layers
– Adjust N points in polygon
-Centroids
– Counting points on polygons
– Convert polygons into polylines
– Symmetric difference
– Eliminate gaps
– Grid statistics in polygons
-Intersection
– Geometric properties of polygons
-Union
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- Tools for point layers
– Point-Set layer to another layer
– Nearest neighbor analysis
– Analysis by quadrant
– Add coordinates to points
– Spatial autocorrelation
– Layer of points from Table
– Medium Center
– Medium Center and typical distance
-Spatial (cluster) classification
– Minimum Envelopes
– Ripley’s K
-Clearing dot’s layer
– Distance Matrix
– Sampling raster layers
– Disturbing layer points
– Delaunay triangulation
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- Tools for categorical raster layers
– Cross check (Kappa Index)
– Merge grids
– Delete Aggregates by size
– Statistics class
-Fragstats (metric area / density / edge)
-Fragstats (metrics of diversity)
– from table and classified grid
– Aggregation Index
– Lagoon
- Tools for tables
– Correlation between fields
– Basic statistics
- Optimal location of elements
– Optimal location
- Fuzzy logic
– Prepare for fuzzy logic
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- Tools for generic vector layers
-Bounding Box
– Field Calculator
– Vector layer with random geometries
-Sort (cluster)
– Turning geometries to points
– Correlation between fields
-Cut
– Cut by rectangle
– Create grid
– Difference
– Dissolve
– Basic statistics
– Exporting vector layer
– Histogram
– Gather
– Separate entities
– Separate multi-party entities
– Test of normality
– Transform
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- Tools for creating new RASTER layers
– Generate Bernoulli random grid
-Generate normal random grid
-Generate uniform random grid
-Generate artificial MDT
– Grid based on mathematical function
– Constant value Grid
- Lighting and visibility
– Visual Exposition
-Horizontal visible
– Line of Sight
– Line of Sight (RF)
– Solar radiation
– Shaded Relief
-Visibility
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- Vegetation indexes
-CTVI
-NDVI
-NRVI
-PVI(Perry and Lautenschlager)
-PVI(Qi et al)
-PVI(Walther and Shabaani)
-TTVI
-TVI
- Profiles
-Longitudinal profile
– Profile as line flow
– Cross Sections
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- Indexes and other hydrological parameters
– Net balance of cells
– Edge Contamination
– Creating synthetic histogram
– Distance to drainage
– Lift on the drainage
– C factor from NDVI
– Instantaneous unit histogram geomorphologic
– Topographic indexes
– Slope length
– Strahler order
– USPED A hydrologic model
– Maximum value upstream
– Mean upstream
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- Statistical methods
– Principal component analysis
– Binomial probability distribution
– Chi-square probability distribution
– Exponential distribution function
– Normal probability distribution
– Student probability distribution
– Covariance matrix
– Regression
– Multiple Regression
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- Rasterization and Interpolation
– Linear Decrease
– Density
– Density (kernel)
– Inverse distance
-Kriging
– Universal Kriging
– Rasterizing vector layer
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- Reclassification of RASTER layers
– Split into n classes of equal amplitude
– Split into n classes of equal area
– Reclassify
– Reclassify consecutive classes
– Reclassify disjoint classes
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- Treatment and image analysis
– Thinning
– Calibrate an image
– Calibrate an image (by regression)
– Detect and vectorize individual trees
-Equalization
-Erosion/Expansion
-Contrast expansion
-HIS –> RGB
-RGB –> HIS
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- Vectorization
-Raster layer to dots layer
-Contour level
– Vectorizing raster layer (lines)
– Vectorizing raster layer (polygons)
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- Areas of influence (buffers)
– Zone of influence (raster)
– Zone of influence of fixed distance
– Zone of influence of variable distance
– Zone of influence through threshold
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From here you can download SEXTANT, the compatible version with gvSIG 1.9 (stable) Installing it only requires that the moment it asks you, indicate where gvSIG is installed.
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