I am plotting latitudes and longitudes (300 in total) in R. But my code is only showing a single point on a map. Can anyone please tell me how to visualize all the points on a map ? My code is mentioned below;
library("ggmap")
library(maptools)
library(maps)
visit.x <- Nlongs
visit.y <- Nlats
mp <- NULL
mapWorld <- borders("world", colour="gray50", fill="gray50")
# create a layer of borders
mp <- ggplot() + mapWorld
#Now Layer the cities on top
mp <- mp+ geom_point(aes(x=visit.x, y=visit.y) ,color="blue", size=3)
mp
> Nlongs
[1] 5.010786 5.010823 5.010862 5.010823 5.010873 5.010872 5.010873
5.010823 5.010872
> Nlats
[1] 47.29396 47.29397 47.29398 47.29397 47.29396 47.29396 47.29396
47.29397 47.29393
Here is the correct implentation. You will need to provide/read in a list of names of the 300 visited cities to the visited
vector. Here I provide 3.
visited <- c("Dijon", "Cambridge", "Los Angeles")
ll.visited <- geocode(visited)
ll.visited
mp <- NULL
mapWorld <- borders("world", colour="gray50", fill="gray50")
# provide ll.visited data to ggplot
mp <- ggplot(ll.visited) + mapWorld
# assign x and y to correspond to lon and lat of ll.visited
mp <- mp + geom_point(aes(x=lon, y=lat), color="blue", size=3)
mp
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