dataRetrieval (version 2.0.1)

readNWISuv: Raw Data Import for Instantaneous USGS NWIS Data

Description

Imports data from NWIS web service. This function gets the data from here: http://waterservices.usgs.gov/ A list of parameter codes can be found here: http://nwis.waterdata.usgs.gov/nwis/pmcodes/ A list of statistic codes can be found here: http://nwis.waterdata.usgs.gov/nwis/help/?read_file=stat&format=table. More information on the web service can be found here: http://waterservices.usgs.gov/rest/IV-Service.html.

Usage

readNWISuv(siteNumbers, parameterCd, startDate = "", endDate = "",
  tz = "")

Arguments

siteNumbers

character USGS site number (or multiple sites). This is usually an 8 digit number

parameterCd

character USGS parameter code. This is usually an 5 digit number.

startDate

character starting date for data retrieval in the form YYYY-MM-DD. Default is "" which indicates retrieval for the earliest possible record.

endDate

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

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"

Value

• A data frame with the following columns: lll{ Name Type Description agency_cd character The NWIS code for the agency reporting the data site_no character The USGS site number dateTime POSIXct The date and time of the value converted to UTC tz_cd character The time zone code for dateTime code character Any codes that qualify the corresponding value value numeric The numeric value for the parameter } 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: lll{ Name Type Description url character The url used to generate the data siteInfo data.frame A data frame containing information on the requested sites variableInfo data.frame A data frame containing information on the requested parameters statisticInfo data.frame A data frame containing information on the requested statistics on the data queryTime POSIXct The time the data was returned }

See Also

renameNWISColumns, importWaterML1

Examples

siteNumber <- '05114000'
parameterCd <- '00060'
startDate <- "2014-10-10"
endDate <- "2014-10-10"
# These examples require an internet connection to run
rawData <- readNWISuv(siteNumber,parameterCd,startDate,endDate)

timeZoneChange <- readNWISuv(c('04024430','04024000'),parameterCd,
         "2013-11-03","2013-11-03")
firstSite <- timeZoneChange[timeZoneChange$site_no == '04024430',]