ncmap {sp} | R Documentation |
North Carolina county boundaries in maps package format
data(ncmap)
The format is: List of 4 $ x : num [1:3771] -79.5 -79.5 -79.5 -79.5 -79.5 ... $ y : num [1:3771] 35.8 35.9 35.9 36.0 36.2 ... $ range: num [1:4] -84.3 -75.5 33.9 36.6 $ names: chr [1:102] "north carolina,alamance" "north carolina,alexander" ... - attr(*, "class")= chr "map"
## Not run: library(maps) ncmap <- map("county", "north carolina", fill=TRUE, col="transparent", plot=FALSE) ## End(Not run) data(ncmap) IDs <- sapply(strsplit(ncmap$names, ","), function(x) x[2]) nc2 <- as.SpatialPolygons.map(ncmap, IDs) plotSpatialPolygons(nc2) invisible(text(getSpPPolygonsLabptSlots(nc2), labels=getSpPPolygonsIDSlots(nc2), cex=0.6))