I have one problem. When I plot my coordinates using ggmap it does not connect segments according to date column. I end up having a weird map. Any idea how to fix this? Thanks for your help in advance.
this is what did.
p=ggmap(mapImageData)+
geom_point(aes(x = Longitude, y = Latitude, group=DataID, color=factor(DataID)),
size = 4,
pch= 20,
data=koeco)
p + geom_line(aes(x = Longitude, y = Latitude, group=DataID, color=factor(DataID)),
size = 1,
data=koeco) +
theme_bw() +
annotate("text", x=110.3539, y=48.8, label = "Start",
colour = I("red"), size = 5) +
annotate("text", x=116.2648, y=28.5, label = "End",
colour = I("red"), size = 5) +
labs(x = "Longitude", y = "Latitude", colour = "Routes")
The help for geom_line
says:
Description:
Connect observations, ordered by x value.
The help for geom_path
says:
Description:
Connect observations in original order
So I'm guessing you should use geom_path
. Its a guess because you haven't given us some data to try this on.
By "original order" it means the order in the data frame. If your data isn't in date-sorted order then it will still jump around, but I'm guessing (also) that your data frame is sorted by date (these things usually are).