get_station_data {aire.zmvm} | R Documentation |
Download pollution data by station
Description
Retrieve pollution data by station, in the original units, from the air quality server at Consulta de Concentraciones, or for earlier years use the archive files available from Contaminante, or Meteorología for meteorological data. There's a mistake in the 2016 wind speed data, so for this year, and only this year, the alternative Excel file was used.
Usage
get_station_data(criterion, pollutant, year, progress = interactive())
Arguments
criterion |
Type of data to download.
|
pollutant |
The type of pollutant to download.
|
year |
a numeric vector containing the years for which to download data (the earliest possible value is 1986) |
progress |
whether to display a progress bar (TRUE or FALSE). By default it will only display in an interactive session. |
Details
Temperature (TMP) archive values are correct to one decimal place, but the most recent data is only available rounded to the nearest integer.
Value
A data.frame with pollution data. When downloading "HORARIOS" the hours correspond to the Etc/GMT+6 timezone, with no daylight saving time
Warning
The data for the current month is in the process of being validated
See Also
stations
for a data.frame with the location and names
of all pollution measuring stations,
Other raw data functions:
get_station_month_data()
Examples
## Not run:
## Download daily maximum PM10 data (particulate matter 10 micrometers or
## less in diameter) from 2015 to 2016
df <- get_station_data("MAXIMOS", "PM10", 2015:2016)
head(df)
## Download ozone concentration hourly data for 2016
df2 <- get_station_data("HORARIOS", "O3", 2016)
## Convert to local Mexico City time
df2$mxc_time <- format(as.POSIXct(paste0(df2$date, " ", df2$hour, ":00"),
tz = "Etc/GMT+6"),
tz = "America/Mexico_City")
head(df2)
## End(Not run)