NOAA_allStations: Get list of weather stations from NOAA
In FluMoDL: Influenza-Attributable Mortality with Distributed-Lag Models

Description Usage Arguments Details Value

Download the list of all available weather stations from NOAA, or only those for a specific country and period

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NOAA_allStations(force_retrieve = FALSE)

NOAA_countryStations(fips, from = NULL, to = NULL)

`force_retrieve`	If `TRUE` download the list again from NOAA (even if it was already downloaded previously). Defaults to `FALSE`, so that download happens only once per session.
`fips`	2-letter country FIPS ID (full list of codes at ftp://ftp.ncdc.noaa.gov/pub/data/gsod/country-list.txt).
`from`	Lower limit of reporting period (as class `Date`). Only retrieve stations whose period of record ends at or after this date.
`to`	Upper limit of reporting period (as class `Date`). Only retrieve stations whose period of record begins at or before this date.

NOAA_allStations() downloads the list of all available weather stations from NOAA, found in ftp://ftp.ncdc.noaa.gov/pub/data/noaa/isd-history.csv, and returns it as a data.frame. The data are downloaded only once per R session, the first time this function is used, and are then stored internally for further retrievals.

NOAA_countryStations() retrieves the list for a specific country only (or several countries, if length(ctry)>1), and possibly only for a specific period of record.

A data.frame with the following columns (copy-pasted from NOAA):

usaf: Air Force station ID. May contain a letter in the first position.
wban: NCDC WBAN number
ctry: FIPS country ID
st: State for US stations
icao: ICAO ID
lat: Latitude in thousandths of decimal degrees
lon: Longitude in thousandths of decimal degrees
elev.m.: Elevation in meters
begin: Beginning Period Of Record. There may be reporting gaps within the P.O.R.
end: Ending Period Of Record. There may be reporting gaps within the P.O.R.