gdistance-package: gdistance: geographic distance calculations

In gdistance: Distances and Routes on Geographical Grids

Description

Calculate distances and routes on geographic grids.

Details

Package:	gdistance
Type:	Package
Version:	1.1-1
Date:	2011-01-04
License:	GPL (>=3)
LazyLoad:	yes

Distances can be calculated following these steps.

1. Read spatial grid data into the R environment, using the raster package. Function: raster.

2. Construct an object of the class TransitionLayer or TransitionStack. Function: transition.

3. Correct diagonal connections and projection distortions. Function: geoCorrection.

4. Get coordinates for the starting and end points of routes.

5. Calculate distances and routes. Functions: accCost, costDistance, commuteDistance, rSPDistance, shortestPath, passage, pathInc.

Author(s)

Jacob van Etten [e-mail]

References

Ray, N. 2005. PATHMATRIX: a geographical information system tool to compute effective distances among samples. Molecular Ecology Notes 5, 177 - 180. http://cmpg.unibe.ch/software/pathmatrix/

McRae, B.H. 2006. Isolation by resistance. Evolution 60(8), 1551 - 1561.

McRae B.H., B.G. Dickson, and T. Keitt. 2008. Using circuit theory to model connectivity in ecology, evolution, and conservation. Ecology 89:2712-2724. http://www.circuitscape.org

See Also

raster

gdistance documentation built on May 2, 2019, 5:46 p.m.