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gdistance

Distances and Routes on Geographical Grids

Provides classes and functions to calculate various distance measures and routes in heterogeneous geographic spaces represented as grids. The package implements measures to model dispersal histories first presented by van Etten and Hijmans (2010) <doi:10.1371/journal.pone.0012060>. Least-cost distances as well as more complex distances based on (constrained) random walks can be calculated. The distances implemented in the package are used in geographical genetics, accessibility indicators, and may also have applications in other fields of geospatial analysis.

Functions (22)

ArithMath-methods

Arithmetic and mathematical operations with objects of Transition* classes

Coords-class

Coords class

Summary-methods

Summary methods

Transition-classes

Transition classes

Transition-extract-replace

Extracting and replacing: class Transition

Transition-slots

Extract or change elements of Transition* objects

Accumulated Cost Surface

adjacencyFromTransition

Adjacent cells

commuteDistance-methods

Commute-time distance Calculates the resistance distance between points.

costDistance-methods

Cost distance

Distances and Routes on Geographical Grids

Genetic distances and coordinates of haplogroup R1b1b2 populations in Europe

geoCorrection

Geographic Correction

Normalize

Overlap and nonoverlap of trajectories

Probability of passage

Incidence of paths from a common origin: overlap and non-overlap

rSPDistance

Randomized shortest path distance

rasterFromTransition

RasterLayer from TransitionLayer object

shortestPath

Shortest path

sumReciprocal

Reciprocal of the sum of the reciprocals of conductance values in Transition* objects

Create an object of the class Transition

gdistance

Distances and Routes on Geographical Grids

v1.3-6

GPL (>= 2)

Authors

Jacob van Etten [aut] (<https://orcid.org/0000-0001-7554-2558>), Kauê de Sousa [cre, ctb] (<https://orcid.org/0000-0002-7571-7845>)

Initial release

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