geosphere, RColorBrewer, plotly, leaflet, ggmap, rjson
geosphere, RColorBrewer, plotly, leaflet, ggmap, rjson, sp,
grDevices, plyr, RCurl, utils, tools
geosphere, RColorBrewer, leaflet, grDevices, plyr, RCurl,
utils
geosphere, matlab, leaflet, grDevices, plyr, RCurl, utils