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ggmap is an R package best known for spatial visualization with Google Maps and OpenStreetMap
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simple plotting of (latitude, longitude) points on a global map
I have a dataframe like the following:
country <- c('US', 'CA','TW')
city <- c('Atlanta','Halifax','Taipei')
lat <- c(33.8004, 44.6500, 25.0392 )
lon <- c( -84.3865,-63.6000,121.5250 )
data <- data_ …