ggmap : Spatial Visualization with ggplot2
David Kahle, Hadley Wickham
The r journal, Volume 5/1, June 2013
In spatial statistics the ability to visualize data and models superimposed with their basic
social landmarks and geographic context is invaluable. ggmap is a new tool which enables such
visualization by combining the spatial information of static maps from Google Maps, OpenStreetMap,
Stamen Maps or CloudMade Maps with the layered grammar of graphics implementation of ggplot2.
In addition, several new utility functions are introduced which allow the user to access the Google
Geocoding, Distance Matrix, and Directions APIs. The result is an easy, consistent and modular
framework for spatial graphics with several convenient tools for spatial data analysis.
Keywords: R, package, ggmap, ggplot2, statistiques, CRAN .