dataRetrieval (version 2.1.4)

readNWISdata: General Data Import from NWIS

Description

Returns data from the NWIS web service. Arguments to the function should be based on http://waterservices.usgs.gov service calls.

Usage

readNWISdata(service = "dv", ...)

Arguments

service

string. Possible values are "iv" (for instantaneous), "dv" (for daily values), "gwlevels" (for groundwater levels), "site" (for site service), and "qw" (water-quality). Note: "qw" calls go to: http://nwis.waterdata.usgs.gov/usa/nwis/qwdata for data requests, and use different call requests schemes.

...

see http://waterservices.usgs.gov/rest/Site-Service.html#Service for a complete list of options

Value

A data frame with the following columns:

Name	Type
Description	agency
character	The NWIS code for the agency reporting the data
site	character
The USGS site number	datetime
POSIXct	The date and time of the value converted to UTC (for unit value data),
	character
or raw character string	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:

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, importRDB1

Examples

## Not run: 
# # Examples not run for time considerations
# dataTemp <- readNWISdata(stateCd="OH",parameterCd="00010")
# dataTempUnit <- readNWISdata(sites="03086500", service="iv", parameterCd="00010")
# #Empty:
# multiSite <- readNWISdata(sites=c("04025000","04072150"), service="iv", parameterCd="00010")
# #Not empty:
# multiSite <- readNWISdata(sites=c("04025500","040263491"), service="iv", parameterCd="00060")
# bBoxEx <- readNWISdata(bBox=c(-83,36.5,-81,38.5), parameterCd="00010")
# 
# startDate <- as.Date("2013-10-01")
# endDate <- as.Date("2014-09-30")
# waterYear <- readNWISdata(bBox=c(-83,36.5,-81,38.5), parameterCd="00010",
#                   service="dv", startDate=startDate, endDate=endDate)
# siteInfo <- readNWISdata(stateCd="WI", parameterCd="00010",
#                   hasDataTypeCd="iv", service="site")
# qwData <- readNWISdata(bBox=c(-82.5,41.52,-81,41),startDate=as.Date("2000-01-01"),
#                   drain_area_va_min=50, qw_count_nu=50,qw_attributes="expanded",
#                   qw_sample_wide="wide",list_of_search_criteria=c("lat_long_bounding_box",
#                   "drain_area_va","obs_count_nu"),service="qw")
# ## End(Not run)