With coordinates. They must be lat/long in decimal degrees: Withsfobjects: library(sf) library(ggplot2)#this requires the devlopment version of ggplot2#Create an sf object out of the included state.center dataset:pts<-lapply(seq_along(state.center$x),function(i) { st_point(c(state.center...
Latitude and longitude values can be specified with degrees, minutes, and seconds or decimal degrees. Just knowing a latitude and longitude value may not explicitly specify a point on the globe. This is because you need to designate the hemisphere as well as for the latitude and longitude value...