SEXTANTE, + 220 routines for gvSIG

Sextant gvsig Just as GRASS complements Quantum GIS, SEXTANTE does it with gvSIG, maintaining the specialty. They are the best of the collaborative efforts between open source alternatives in the geospatial environment, seeking to avoid duplication.

The effort by gvSIG to remain in vector management with many CAD capabilities Is complemented by everything that has been built on SEXTANTE after it abandoned its purely raster approach with SAGA and became a library for many other GIS programs to implement and extend to the vector approach. Here I show you the list of about 240 algorithms that exist for GvSIG 1.9:

  • Pattern Analysis
    -Number of classes
  • Basic hydrological analysis
    -Acumulation of flow
    -Consisting by size
    -Beach slope to an area
    - Watershed at a given point
    -Deleting depressions
    -Red drain
    -Time of departure
  • Costs, distances and routes
    - Accumulated (anisotropic)
    - Accumulated (anisotropic) (B)
    - Cumulative (combined)
    - Accumulated (isotropic)
    -Cost for predefined routes
    -Cost by predefined routes (anisotropic)
    -Cost by predefined routes (anisotropic) (B)
    -Generate alternative routes
    -Polar to rectangular
    -Rest of minimum cost
    -Sum costs to all points
  • Cell statistics for multiple raster layers
    -Map of value
    -Minimum value cover
    -Count equal to
    -More than
  • Geostatistics
    -Radio of variance
    -Switches (raster)
  • Geomorphometry and relief analysis
    -Real area
    -Classification of terrain forms
    - Anisotropic variation coefficient
    - Elevation index - relief
    -Protection index
  • Analysis tools for raster layers
    -Change Vector Analysis
    Unclassified classification (clustering)
    Supervised Classification
    Supervised classification (B)
    -Curva ROC
    Analytical Hierarchies (AHP)
    - Predictive models
    -Orderd Weighted Avaraging (OWA)
  • Basic Tools for Raster Layers
    -Adjust extension with valid data
    -Valculation of volumes
    -change type of data
    -Complete grid
    -Correlation between layers
    -Cutting raster layer with polygon layer
    - Basic statistics
    - User defined 3 x 3 filter
    -Invert mask
    - Gradient lines
    -Location of maximum values
    -Reflect / Reverse
    -Filling cells without data
    -Filling cells without data (by neighborhood)
    -Unlay layers
    -Volumes between two layers
  • Calculation tools for raster layers
    -Mapper calculator
  • Line Layer Tools
    -Convert equispaced dotted lines
    -Convert lines into simple segments
    -Converting polylines into polygons
    -Fragmented lines with layer of points
    -Invert sense of lines
    -Directional Media
    -Exampling line ends
    - Geometric properties of lines
    -Select polylines in nodes
    -Simplify lines
  • Polygon Layer Tools
    -Adjust N points in polygon
    -Contact points in polygons
    -Convert polygons into polylines
    Symmetrical difference
    -Remove holes
    Grid statistics on polygons
    - Geometric properties of polygons
  • Tools for layer layers
    -Adjust layer of dots to another layer
    -Analysis of the nearest neighbor
    -Quantity Analysis
    -Add coordinates to points
    -Autocorrelation spatial
    -Sheet of points from table
    -Medium center
    - Average center and typical distance
    -Classify (cluster) spatially
    -Minimum Envelope
    -K from Ripley
    -clear point layer
    -Matrix of distances
    -Show raster layers
    -Perform layer layer
    -Triangulation of Delaunay
  • Tools for categorical raster layers
    Cross-check (Kappa Index)
    -Combine grids
    -Delete Aggregates by Size
    - Class statistics
    -Fragstats (metrics
    Of area / density / border)
    -Fragstats (diversity metrics)
    -Grids from table and grid classified
    - Aggregation index
  • Tools for tables
    -Correlation between fields
    - Basic statistics
  • Optimum location of elements
    -Optimal location
  • Diffuse logic
    -Prepare for fuzzy logic
  • Tools for generic vector layers
    -Bounding Box
    -Field Calculator
    - Vector layer with random geometries
    -Categorize (cluster)
    - Convert geometries into points
    -Correlation between fields
    -Cut by rectangle
    To create lattice
    - Basic statistics
    -Export vector layer
    -Put together
    -Select Entities
    -Select multipart entities
    -Test of normality
  • Tools for creating new rasater layers
    -Generate Random Grid Bernoulli
    -Generar random random
    -Generate Uniform Random Grid
    -To generate artificial MDT
    -Grid from math function
    -Grid of constant value
  • Lighting and visibility
    -Horizontal visible
    -Line line
    -Line of sight (radiofrequency)
    -Solar radiation
    -Relieve shaded
  • Vegetation indices
    -PVI (Perry and Lautenschlager)
    -PVI (Qi et al)
    -PVI (Walther and Shabaani)
  • Profiles
    -Longitudinal profile
    -Product according to flow line
    - Cross sections
  • Indices and other hydrological parameters
    -Balance net balance
    -Contamination of edge
    -Create synthetic histogram
    -Distance to drainage network
    -Elevation on the drainage network
    -Factor C from NDVI
    -Initial instantaneous geomorphological histogram
    - Topographical indices
    -Length of slope
    -Redhler Order
    -A hydrological model
    -Value maximum upstream value
    -Value average upstream
  • Statistical Methods
    -Principal component analysis
    -Divomial probability distribution
    -Division probability chi square
    -Exponential probability distribution
    -Distribution of normal probability
    -Division of Student's probability
    -Master of covariances
    -Regression multiple
  • Rasterization and interpolation
    -Linear decree
    -Density (kernel)
    -Inverse distance
    -King Universal
    -Rasterize vector layer
  • Reclassification of reaster layers
    -Dividing into n classes of equal amplitude
    -Dividing into n classes of equal area
    -Reclassify in consecutive classes
    -Reclose in disjoint classes
  • Image processing and analysis
    -calibrate an image
    -Calibrate an image (by regression)
    -Detect and vectorize individual trees
    -Erosion / Dilation
    -Extension of contrast
    -HIS -> RGB
    -RGB -> HIS
  • Vectorization
    -Raster layer to layer of points
    Level curves
    -Vectorize raster layer (lines)
    -Vectorize raster layer (polygons)
  • Areas of influence (buffers)
    - Area of ​​influence (raster)
    - Fixed distance influence zone
    -Influence zone of variable distance
    -Interest zone through threshold

From here you can download SEXTANTE, the version compatible with gvSIG 1.9 (stable). Installing it only requires that when you request it, you indicate where gvSIG is installed.

Golgi Alvarez

Writer, researcher, specialist in Land Management Models. He has participated in the conceptualization and implementation of models such as: National Property Administration System SINAP in Honduras, Management Model of Joint Municipalities in Honduras, Integrated Cadastre-Registry Management Model in Nicaragua, Territory Administration System SAT in Colombia . Editor of the Geofumadas knowledge blog since 2007 and creator of the AulaGEO Academy that includes more than 100 courses on GIS - CAD - BIM - Digital Twins topics.

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