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R package source for data retrieval specifically for the EGRET R package:
[EGRET Wiki](https://github.com/USGS-R/EGRET/wiki)
This software is in the public domain because it contains materials that originally came from the U.S. Geological Survey (USGS), an agency of the United States Department of Interior. For more information, see the official USGS copyright policy at [http://www.usgs.gov/visual-id/credit_usgs.html#copyright](http://www.usgs.gov/visual-id/credit_usgs.html#copyright)
Although this software program has been used by the USGS, no warranty, expressed or implied, is made by the USGS or the U.S. Government as to the accuracy and functioning of the program and related program material nor shall the fact of distribution constitute any such warranty, and no responsibility is assumed by the USGS in connection therewith.
Subscribe
---------
Please email questions, comments, and feedback to:
egret_comments@usgs.gov
Additionally, to subscribe to an email list concerning updates to these R packages, please send a request to egret_comments@usgs.gov.
While the dataRetreival package is in development (and not on CRAN), the zoo package must first be manually installed. To install the dataRetrieval package, you must be using R 3.0 or greater and run the following commands:
install.packages("dataRetrieval",
repos=c("http://usgs-r.github.com","http://cran.us.r-project.org"),
dependencies=TRUE,
type="both")
dataRetrieval 1.4.0-in developement
===========
* Changed naming convention:
getDVData -> getNWISDaily
getSampleData -> getNWISSample
getSTORETData* -> getWQPSample
getSampleDataFromFile -> getUserSample
getDailyDataFromFile -> getUserDaily
getMetaData -> splits into getNWISInfo and getUserInfo
getSiteFileData <- getNWISSiteInfo
getParameterInfo <- getNWISPcodeInfo
getDataAvailability <- getNWISDataAvailability
'retrieve' functions changed to 'get'
* Changed WaterML2 rbind fill from plyr function to dplyr. Removed plyr import, added dplyr.
*
* Updated getNWISSiteInfo to retrieve multiple site file datasets at once using a vector of siteNumbers as input argument.
* Updated error-handling for Web service calls. More information is returned when errors happen
* Added some basic processing to Water Quality Portal raw data retrievals. Date columns are returned as Date objects, value columns are numeric, and a column is created from the date/time/timezone columns that is POSIXct.
* Added very generalized NWIS and WQP retrieval functions (getNWISData, getNWISSites, getGeneralWQPData, and getWQPSites) which allow the user to use any argument available on the Web service platform.
* Deprecated getQWData, updated getWQPData to take either parameter code or characteristic name.
* Changed the name of raw data retrievals to: getNWISqwData, getNWISunitData, getNWISdvData, and getWQPqwData (from: getNWISqwData, retrieveUnitNWISData, retrieveNWISData, getRawQWData)
* Added NA warning to getDVData function
* Updated mergeReport to allow for Sample data with different measurements taken on the same day
Sample Workflow
---------------
Load data from web services:
library(dataRetrieval)
Daily <- getNWISDaily("06934500","00060","1979-10-01","2010-09-30")
Sample <-getNWISSample("06934500","00631","1970-10-01","2011-09-30")
INFO <-getNWISInfo("06934500","00631", interactive=FALSE)