GSIF (version 0.3-1)

geochm: NGS database samples for Indiana State

Description

A subset of the National Geochemical Survey (NGS) samples covering the Indiana and Illinois State. Contains a total of 2681 point samples.

Usage

data(geochm)

References

• The National Geochemical Survey Team, (2008)http://tin.er.usgs.gov/geochem/doc/home.htm{The National Geochemical Survey: database and documentation}. U.S. Geological Survey Open-File Report 2004-1001, U.S. Geological Survey, Reston VA.
• National Geochemical Survey database (http://tin.er.usgs.gov/geochem/)

Examples

library(sp)

# Load the NGS data:
data(geochm)
coordinates(geochm) <- ~LONGITUDE+LATITUDE
proj4string(geochm) <- CRS("+proj=longlat +ellps=clrk66 +datum=NAD27 +no_defs")
require(plotKML)
data(SAGA_pal)
# replace the missing values with half the detection limit:
geochm$PB_ICP40 <- ifelse(geochm$PB_ICP40 < 0, 2, geochm$PB_ICP40) 
shape = "http://maps.google.com/mapfiles/kml/pal2/icon18.png"
kml(geochm, shape = shape, colour = log1p(PB_ICP40), labels = "", 
    colour_scale = SAGA_pal[[1]], kmz = TRUE)