readNWISdv.Rd

% Generated by roxygen2 (4.1.1): do not edit by hand
% Please edit documentation in R/readNWISdv.r
\name{readNWISdv}
\alias{readNWISdv}
\title{Daily Value USGS NWIS Data Retrieval}
\usage{
readNWISdv(siteNumber, parameterCd, startDate = "", endDate = "",
  statCd = "00003")
}
\arguments{
\item{siteNumber}{character USGS site number.  This is usually an 8 digit number. Multiple sites can be requested with a character vector.}

\item{parameterCd}{character of USGS parameter code(s).  This is usually an 5 digit number.}

\item{startDate}{character starting date for data retrieval in the form YYYY-MM-DD. Default is "" which indicates
retrieval for the earliest possible record. Date arguments are always specified in local time.}

\item{endDate}{character ending date for data retrieval in the form YYYY-MM-DD. Default is "" which indicates
retrieval for the latest possible record. Date arguments are always specified in local time.}

\item{statCd}{character USGS statistic code. This is usually 5 digits.  Daily mean (00003) is the default.}
}
\value{
A data frame with the following columns:
\tabular{lll}{
Name \tab Type \tab Description \cr
agency \tab character \tab The NWIS code for the agency reporting the data\cr
site \tab character \tab The USGS site number \cr
Date \tab Date \tab The date of the value \cr
code \tab character \tab Any codes that qualify the corresponding value\cr
value \tab numeric \tab The numeric value for the parameter \cr
}
Note that code and value are repeated for the parameters requested. The names are of the form
X_D_P_S, where X is literal,
D is an option description of the parameter,
P is the parameter code,
and S is the statistic code (if applicable).

There are also several useful attributes attached to the data frame:
\tabular{lll}{
Name \tab Type \tab Description \cr
url \tab character \tab The url used to generate the data \cr
siteInfo \tab data.frame \tab A data frame containing information on the requested sites \cr
variableInfo \tab data.frame \tab A data frame containing information on the requested parameters \cr
statisticInfo \tab data.frame \tab A data frame containing information on the requested statistics on the data \cr
queryTime \tab POSIXct \tab The time the data was returned \cr
}
}
\description{
Imports data from NWIS web service. This function gets the data from here: \url{http://waterservices.usgs.gov/}
}
\examples{
siteNumber <- '04085427'
startDate <- '2012-01-01'
endDate <- '2012-06-30'
pCode <- '00060'
\dontrun{
rawDailyQ <- readNWISdv(siteNumber,pCode, startDate, endDate)
rawDailyQAndTempMeanMax <- readNWISdv(siteNumber,c('00010','00060'),
       startDate, endDate, statCd=c('00001','00003'))
rawDailyQAndTempMeanMax <- renameNWISColumns(rawDailyQAndTempMeanMax)
rawDailyMultiSites<- readNWISdv(c("01491000","01645000"),c('00010','00060'),
       startDate, endDate, statCd=c('00001','00003'))
# Site with no data:
x <- readNWISdv("10258500","00060", "2014-09-08", "2014-09-14")
names(attributes(x))
attr(x, "siteInfo")
attr(x, "variableInfo")

site <- "05212700"
notActive <- readNWISdv(site, "00060", "2014-01-01","2014-01-07")
}
}
\seealso{
\code{\link{renameNWISColumns}}, \code{\link{importWaterML1}}
}
\keyword{USGS}
\keyword{data}
\keyword{import}
\keyword{service}
\keyword{web}