A dataset containing information to draw a map of Rockville, MD, and vicinity using
This information was pulled from Google Maps using the ggmap package.
An object of class "ggmap" and "raster" containing a map of the Rockville, MD, area.
D. Kahle and H. Wickham. ggmap: Spatial Visualization with ggplot2. The R Journal, 5(1), 144-161. https://journal.r-project.org/archive/2013-1/kahle-wickham.pdf
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