Climate normals of Agriculture and Agri-Food Canada at given points

Queries the "Derived Normal Climate Data" of Agriculture and Agri-Food Canada (30-year normals on a 5 km grid, Open Government Licence - Canada) at each point: the monthly mean air temperature of every month, and the monthly minimum and maximum temperature and the precipitation from April to October (the growing season of these normals). The values come from the AAFC map service (one request per variable and per thousand points); no file is downloaded. Needs the httr and jsonlite packages and an internet connection.

Usage

fetch_aafc_normals(lat, lon, period = "1961-1990", id = NULL, verbose = TRUE)

Arguments

lat, lon: Decimal degrees (WGS 84).
period: One of "1961-1990", "1971-2000", "1981-2010", "1991-2020".
id: Optional identifiers, returned as the first column.
verbose: Print progress.

Value

A data frame with id, lat, lon and one column per variable (ta_m01 to ta_m12, tn_m04 to tn_m10, tx_m04 to tx_m10, ac_m04 to ac_m10; degrees Celsius and mm), with the period and the source as attributes. Points outside the grid get NA.

References

Agriculture and Agri-Food Canada. Derived Normal Climate Data. Open Government Portal (dataset 3a060b8f-e662-4a60-b297-3bed859ffc8a), Open Government Licence - Canada.

Examples

if (FALSE) { # \dontrun{
nm <- fetch_aafc_normals(lat = 52.13, lon = -106.67)
npdb_soil_climate(nm)
} # }