R/data.R
mapUS49HUC2.Rd
USGS Hydrological Unit Code (HUC)
mapUS49HUC2
sf
https://water.usgs.gov/GIS/huc.html https://nrcs.app.box.com/v/huc
if (FALSE) { library(rmap) plot(mapUS49HUC2[,"subRegion"]) head(mapUS49HUC2) }