NURE {ramps} | R Documentation |
Connecticut, USA, areal and point-source uranium measurements from the United States Geological Survey (USGS) National Uranium Resource Evaluation (NURE) project.
data(NURE)
The following variables are provided in the NURE
data frame:
ppm
measurement
lon
lat
easting
northing
county
area
id
A grid of coordinates is provided by the NURE.grid
data frame to facilitate Monte Carlo integration in geostatistical modeling of areal measurements. The included columns are
lon
lat
id
Areal measurements in NURE
can be matched to the grid coordinates in NURE.grid
via the shared "id"
variable.
Duval, J.S., Jones, W.J., Riggle, F.R., and Pitkin, J.A. (1989) “Equivalent uranium map of conterminous United States”, USGS Open-File Report 89-478.
Smith, S.M.(2006) “National Geochemical Database Reformatted Data from the National Uranium Resource Evaluation (NURE) Hydrogeochemical and Stream Sediment Reconnaissance (HSSR) Program”, USGS Open-File Report 97-492.
data(NURE) ## Map areal and point-source measurements ppm1 <- NURE$ppm[NURE$measurement == 1] level <- (max(ppm1) - ppm1) / diff(range(ppm1)) map("county", "connecticut", fill = TRUE, col = gray(level)) title("Connecticut Uranium Measurements") points(NURE$lon, NURE$lat) ## Map grid sites map("county", "connecticut") title("Regular Grid of Coordinates") points(NURE.grid$lon, NURE.grid$lat)