numeric; longitude in decimal degrees (NAD27 datum)
LATITIUDE
numeric; latitude in decimal degrees (NAD27 datum)
DATUM
factor; geodetic datum if different from NAD83
RELIEF
factor; relief in drainage basin from which sample was collected
FORMATION
factor; code or name of geologic formation in which sample area was located
ROCK_TYPE
factor; rock type in area of sample collection e.g. "carbonate"
SOIL_HORIZ
factor; soil horizon from which the sample was collected
COLOR
factor; observed color of powdered sample during splitting
MEDIUM
factor; sample medium — rock, sediment, standard, or unknown
SOURCE
factor; geological source of the sample medium that was collected e.g. "Beach"
AS_ICP40
numeric; As (ppm) by Inductively Coupled Plasma Spectrometry (ICP) after acid dissolution
CD_ICP40
numeric; Cd (ppm)
CR_ICP40
numeric; Cr (ppm)
CU_ICP40
numeric; Cu (ppm)
NI_ICP40
numeric; Ni (ppm)
ZN_ICP40
numeric; Zn (ppm)
AS_AA
numeric; As (ppm) by Hydride Atomic Absorption
HG_AA
numeric; Hg (ppm) by Hydride Atomic Absorption
PB_ICP40
numeric; Pb (ppm)
C_TOT
numeric; total carbon (weight percentage) by combustion
C_ORG
numeric; organic carbon (weight percentage) as a difference between C_TOT and C_CO3
C_CO3
numeric; carbonate carbon (weight percentage) by Coulometric Titration
S_TOT
numeric; total sulfur (weight percentage) by combustion
Note
Negative values of the heavy metal concetrations indicate a determination that is below the limit of detection for the analytic method used. The magnitude of the negative number indicates the detection limit. For example, -10 ppm means the result should be regarded as < 10 ppm.
Author(s)
National Geochemical Survey database is maintaned by the USGS National Geochemical Survey Team (contact: Peter Schweitzer). This subset has been prepared for the purpose of testing various geostatistical mapping algoriths by Tomislav Hengl (tom.hengl@isric.org).
R version 3.3.1 (2016-06-21) -- "Bug in Your Hair"
Copyright (C) 2016 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)
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Type 'license()' or 'licence()' for distribution details.
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'citation()' on how to cite R or R packages in publications.
Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
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> library(GSIF)
GSIF version 0.5-2 (2016-06-25)
URL: http://gsif.r-forge.r-project.org/
> png(filename="/home/ddbj/snapshot/RGM3/R_CC/result/GSIF/geochm.Rd_%03d_medium.png", width=480, height=480)
> ### Name: geochm
> ### Title: NGS database samples for Indiana State
> ### Aliases: geochm
> ### Keywords: datasets
>
> ### ** Examples
>
> library(sp)
>
> # Load the NGS data:
> data(geochm)
> coordinates(geochm) <- ~LONGITUDE+LATITUDE
> proj4string(geochm) <- CRS("+proj=longlat +ellps=clrk66 +datum=NAD27 +no_defs")
> ## Not run:
> ##D require(plotKML)
> ##D data(SAGA_pal)
> ##D # replace the missing values with half the detection limit:
> ##D geochm$PB_ICP40 <- ifelse(geochm$PB_ICP40 < 0, 2, geochm$PB_ICP40)
> ##D shape = "http://maps.google.com/mapfiles/kml/pal2/icon18.png"
> ##D kml(geochm, shape = shape, colour = log1p(PB_ICP40), labels = "",
> ##D colour_scale = SAGA_pal[[1]], kmz = TRUE)
> ## End(Not run)
>
>
>
>
>
> dev.off()
null device
1
>