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Try to see src sample that demonstrates how to work with google maps: show map control, spatial tree objects, download map, print map, work offline with local cache etc:


I solved this problem with these instructions: myData$longitude = as.numeric(as.character(myData$longitude)) myData$Magnitude = as.numeric(as.character(myData$Magnitude)) myData$latitude = as.numeric(as.character(myData$latitude))

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