Quantitative visualization of biological data in Google Earth using R2G2, an R CRAN package

Nils Arrigo, Loren P. Albert, Pascal G. Mickelson, Michael S. Barker

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


We briefly introduce R2G2, an R CRAN package to visualize spatially explicit biological data within the Google Earth interface. Our package combines a collection of basic graph-editing features, including automated placement of dots, segments, polygons, images (including graphs produced with R), along with several complex three-dimensional (3D) representations such as phylogenies, histograms and pie charts. We briefly present some example data sets and show the immediate benefits in communication gained from using the Google Earth interface to visually explore biological results. The package is distributed with detailed help pages providing examples and annotated source scripts with the hope that users will have an easy time using and further developing this package. R2G2 is distributed on http://cran.r-project.org/web/packages.

Original languageEnglish (US)
Pages (from-to)1177-1179
Number of pages3
JournalMolecular Ecology Resources
Issue number6
StatePublished - Nov 2012


  • Keyhole markup language
  • Phylogeny
  • R package
  • Spatial data visualization
  • Species diversity

ASJC Scopus subject areas

  • Biotechnology
  • Ecology, Evolution, Behavior and Systematics
  • Genetics


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