| 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:
ppmmeasurementlonlateastingnorthingcountyareaid
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
lonlatid
The 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)