aqs_qa_annualperformanceeval_by_MA: aqs_qa_annualperformanceeval_by_MA

In USEPA/RAQSAPI: A Simple Interface to the US EPA Air Quality System Data Mart API

aqs_qa_annualperformanceeval_by_MA

Description

\lifecycle

stable Returns quality assurance performance evaluation data - aggregated by by Monitoring agency (MA) for a parameter code aggregated by matching input parameter and MA_code for the time frame between bdate and edate.

Usage

aqs_qa_annualperformanceeval_by_MA(
  parameter,
  bdate,
  edate,
  MA_code,
  return_header = FALSE
)

Arguments

parameter	a character list or a single character string which represents the parameter code of the air pollutant related to the data being requested.
bdate	a R date object which represents that begin date of the data selection. Only data on or after this date will be returned.
edate	a R date object which represents that end date of the data selection. Only data on or before this date will be returned.
MA_code	a R character object which represents the 4 digit AQS Monitoring Agency code (with leading zeroes).
return_header	If FALSE (default) only returns data requested. If TRUE returns a AQSAPI_v2 object which is a two item list that contains header information returned from the API server mostly used for debugging purposes in addition to the data requested.

Value

a tibble or an AQS_Data Mart_APIv2 S3 object of quality assurance performance evaluation data. for all monitoring sites for with the MA_code requested for the time frame between bdate and edate. An AQS_Data_Mart_APIv2 is a 2 item named list in which the first item ($Header) is a tibble of header information from the AQS API and the second item ($Data) is a tibble of the data returned.

Note

The AQS API only allows for a single year of quality assurance Annual Performance Evaluation data to be retrieved at a time. This function conveniently extracts date information from the bdate and edate parameters then makes repeated calls to the AQSAPI retrieving a maximum of one calendar year of data at a time. Each calendar year of data requires a separate API call so multiple years of data will require multiple API calls. As the number of years of data being requested increases so does the length of time that it will take to retrieve results. There is also a 5 second wait time inserted between successive API calls to prevent overloading the API server. This operation has a linear run time of /(Big O notation: O/(n + 5 seconds/)/).

See Also

Other Aggregate _by_MA functions: aqs_qa_annualperformanceevaltransaction_by_MA(), aqs_qa_blanks_by_MA(), aqs_qa_collocated_assessments_by_MA(), aqs_qa_flowrateaudit_by_MA(), aqs_qa_flowrateverification_by_MA(), aqs_qa_one_point_qc_by_MA(), aqs_qa_pep_audit_by_MA()

Examples

          # Returns a tibble containing annual performance evaluation data
          #  for ozone where the monitoring agency is the Alabama Department
          #  of Environmental Management (MA_code 0013).
          ## Not run: aqs_qa_annualperformanceeval_by_MA(parameter = "44201",
                                                  bdate = as.Date("20170101",
                                                          format = "%Y%m%d"),
                                                  edate = as.Date("20171231",
                                                          format = "%Y%m%d"),
                                                          MA_code = "0013"
                                                     )
                  
## End(Not run)

USEPA/RAQSAPI documentation built on Jan. 18, 2024, 1:50 a.m.