readNWISmeas.Rd

% Generated by roxygen2 (4.0.2): do not edit by hand
\name{readNWISmeas}
\alias{readNWISmeas}
\title{Reads surface-water measurement data from NWISweb.}
\usage{
readNWISmeas(siteNumbers, startDate = "", endDate = "", tz = "")
}
\arguments{
\item{siteNumbers}{character USGS site number (or multiple sites).  This is usually an 8 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.}

\item{endDate}{character ending date for data retrieval in the form YYYY-MM-DD. Default is "" which indicates
retrieval for the latest possible record.}

\item{tz}{character to set timezone attribute of dateTime. Default is an empty quote, which converts the
dateTimes to UTC (properly accounting for daylight savings times based on the data's provided tz_cd column).
Possible values to provide are "America/New_York","America/Chicago", "America/Denver","America/Los_Angeles",
"America/Anchorage","America/Honolulu","America/Jamaica","America/Managua","America/Phoenix", and "America/Metlakatla"}
}
\value{
A data frame with at least the following columns:
\tabular{lll}{
Name \tab Type \tab Description \cr
agency_cd \tab character \tab The NWIS code for the agency reporting the data\cr
site_no \tab character \tab The USGS site number \cr
tz_cd \tab character \tab The time zone code for dateTime \cr
}

See \url{http://waterdata.usgs.gov/usa/nwis/sw} for details about surface water, and
\url{http://waterdata.usgs.gov/nwis/help?output_formats_help#streamflow_measurement_data}
for help on the columns and codes.

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
queryTime \tab POSIXct \tab The time the data was returned \cr
comment \tab character \tab Header comments from the RDB file \cr
siteInfo \tab data.frame \tab A data frame containing information on the requested sites \cr
}
}
\description{
Reads surface-water measurement data from NWISweb. Data is retrieved from \url{http://waterdata.usgs.gov/nwis}.
See \url{http://waterdata.usgs.gov/usa/nwis/sw} for details about surface water.
}
\examples{
siteNumbers <- c('01594440','040851325')
data <- readNWISmeas(siteNumbers)
}
\seealso{
\code{\link{constructNWISURL}}, \code{\link{importRDB1}}
}