search for: waterways

Hello I'd like to create a simple topological map of a river system, ie all the waterways, where they join and points on them such as gauging stations so that it looks something like the London Tube map - where distances are not important but the relationships of the nodes are. I could probably Heath-Robinson something together but I wondered whether there was any kind of package alread...

...following code to create ppp files from csv data and map shape files, but I am getting some errors which I have been unable to fix by searching them online: library(spatstat) library(maps) library(maptools) NYC2<-readShapePoly("nybb.shp") # this is a map of the NYC boroughs without waterways and no census tract divisions (but it does include lines separating the 5 boroughs) plot(NYC2) NYBorough<-readShapePoly("NYBoroughsShapeMerge.shp") # this is a map of the NYC boroughs with census tract divisions plot(NYBorough) myfile<-read.csv("myfile.csv") # my csv fil...