Created
November 26, 2017 20:44
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library(geosphere) | |
library(sp) | |
data("meuse") | |
library(RgoogleMaps) | |
getGeoCode("Frankfurt, Germany") | |
# lat lon | |
#50.110922 8.682127 | |
LA <- c(-118.40, 33.95) | |
FRA = c(8.682127, 50.110922) | |
data(wrld) | |
plot(wrld, type='l', main= "FRA -> LAX") | |
lines(c(FRA[1],LA[1]), c(FRA[2],LA[2]), col = 2, lwd=2) | |
gc2 <- greatCircle(FRA, LA) | |
lines(gc2, lwd=2, col='blue') | |
cat("The geodesic distance between LA and FRA is ", | |
distHaversine(LA,FRA)/1000,"km \n") | |
#### Plot and compute the great circle distance between Sydney and Darmstadt | |
# If you want to read more about the efficient use of Quadkeys: | |
# https://msdn.microsoft.com/en-us/library/bb259689.aspx | |
#There are various map tile servers | |
# http://mt1.google.com/vt/lyrs=m&x=8799&y=5375&z=14 | |
# http://a.tile.openstreetmap.org/14/8799/5375.png | |
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