Create dataframe of EPA site location metadata

Source: R/epa_createMetaDataframe.R

After additional columns(i.e. datetime, and monitorID) have been applied to an EPA dataframe, we are ready to pull out site information associated with unique monitorID.

These will be rearranged into a dataframe organized as deployment-by-property with one row for each monitorID.

This site information found in tbl is augmented so that we end up with a uniform set of properties associated with each monitorID. The list of columns in the returned meta dataframe is:

> names(p$meta)
 [1] "monitorID"             "longitude"             "latitude"
 [4] "elevation"             "timezone"              "countryCode"
 [7] "stateCode"             "siteName"              "agencyName"
[10] "countyName"            "msaName"               "monitorType"
[13] "monitorInstrument"     "aqsID"                 "pwfslID"
[16] "pwfslDataIngestSource" "telemetryAggregator"   "telemetryUnitID"

epa_createMetaDataframe(
  tbl,
  pwfslDataIngestSource = "EPA",
  existingMeta = NULL,
  addGoogleMeta = TRUE
)

Arguments

tbl

an EPA raw tibble after metadata enhancement
pwfslDataIngestSource

identifier for the source of monitoring data, e.g. 'EPA_hourly_88101_2016.zip'
existingMeta

existing 'meta' dataframe from which to obtain metadata for known monitor deployments
addGoogleMeta

logicial specifying wheter to use Google elevation and reverse geocoding services

Value

A meta dataframe for use in a ws_monitor object.

References

EPA AirData Pre-Generated Data Files

file format description