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The gdistance package provides classes and functions for calculating distances and routes on geographical grids. It implements measures for modeling dispersal histories, including least-cost distances and distances based on constrained random walks. The package was authored by Jacob van Etten and builds on methods first presented by van Etten and Hijmans in 2010.
This is a software package (R package) rather than a static dataset; required tools and dependencies are needed for use.