dataRetrieval (version 2.0.1)

importWaterML2: Function to return data from the WaterML2 data

Description

This function accepts a url parameter for a WaterML2 getObservation. This function is still under development, but the general functionality is correct.

Usage

importWaterML2(obs_url, asDateTime = FALSE, tz = "")

Arguments

obs_url

character containing the url for the retrieval

asDateTime

logical, if TRUE returns date and time as POSIXct, if FALSE, Date

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

• mergedDF a data frame time, value, description, qualifier, and identifier

Examples

baseURL <- "http://waterservices.usgs.gov/nwis/dv/?format=waterml,2.0"
URL <- paste(baseURL, "sites=01646500",
     "startDT=2014-09-01",
     "endDT=2014-09-08",
     "statCd=00003",
     "parameterCd=00060",sep="&")
URL2 <- paste("http://cida.usgs.gov/noreast-sos/simple?request=GetObservation",
     "featureID=MD-BC-BC-05",
     "offering=RAW",
     "observedProperty=WATER",sep="&")
dataReturned1 <- importWaterML2(URL)
dataReturn2 <- importWaterML2(URL2, TRUE)
URLmulti <-  paste(baseURL,
  "sites=04024430,04024000",
  "startDT=2014-09-01",
  "endDT=2014-09-08",
  "statCd=00003",
  "parameterCd=00060",sep="&")
dataReturnMulti <- importWaterML2(URLmulti)
filePath <- system.file("extdata", package="dataRetrieval")
fileName <- "WaterML2Example.xml"
fullPath <- file.path(filePath, fileName)
UserData <- importWaterML2(fullPath)