Tools

Tool name * DesktopGARP
Description

Desktop GARP is a software package for biodiversity and ecologic research that allows the user to predict and analyze wild species distributions. GARP is a genetic algorithm that creates ecological niche models for species. The models describe environmental conditions under which the species should be able to maintain populations. For input, GARP uses a set of point localities where the species is known to occur and a set of geographic layers representing the environmental parameters that might limit the species' capabilities to survive. GARP searches iteratively for non-random correlations between species presence and absence and environmental parameter values using several different types of rules. Each rule type implements a different method for building species prediction models (from: http://ebmtoolsdatabase.org/tool/desktop-garp). The acronym GARP stands for Genetic Algorithm for Rule-set Production. GARP was originally developed by David Stockwell, at the San Diego Supercomputer Center. GARP is a genetic algorithm that creates an ecological niche model for a species that represents the environmental conditions where that species would be able to maintain populations. GARP uses as input a set of point localities where the species is known to occur and a set of geographic layers representing the environmental parameters that might limit the species' ability to survive. GARP tries, interactively, to find non-random correlations between the presence and absence of the species and the values of the environmental parameters, using several types of rules. Each rule type implements a different method for building species prediction models. Currently there are four types of rules implemented: atomic, logistic regression, bioclimatic envelope and negated bioclimatic envelope rules. (from: http://www.nhm.ku.edu/desktopgarp/FAQ.html)

Category All, Data, Mapping, Numerical Model, Spatial Analysis, Visualization
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inputs

Currently three formats are supported: Comma delimited, MS Excel Spreadsheets and ArcView Shapefiles.

Data Quality Required

Modification Required

Not available

Expertise Required

Not available

Spatial and Temporal

Not available

Outputs

The prediction maps can be generated in three formats: bitmaps: MS Windows bitmaps, with extension '.bmp'; ASCII raster grids: ASCII text format, with extension '.asc'; ESRI Arc/Info grids: ESRI proprietary format for grid spatial data storage and management. A separate directory is created for each grid

License cost issues

No

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Literature: References & Manuals *
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