R/data.R

In pollylang/aqtrends: Tools for trend analysis of air quality network data

#' @title Example observation data for the aqtrends package
#'
#' @description Monthly mean NOx concentration data measured at 115 London roadside monitoring sites between 2000-01-01 and 2017-12-31.
#'
#' @format A data frame with 11718 rows and 8 variables:
#' \describe{
#'   \item{site_code}{Unique site code of the monitoring site at which measurement was made}
#'   \item{site_name}{Name of monitoring site}
#'   \item{site_type}{Site classification (all are Urban_traffic i.e. roadside sites)}
#'   \item{latitude}{Latitude of monitoring site}
#'   \item{longitude}{Longitude of monitoring site}
#'   \item{date}{Date of measurement - aggregated to monthly resolution}
#'   \item{variable}{Pollutant measured (NOx for all observations)}
#'   \item{value}{Monthly mean value of \code{variable} measured in ugm-3}
#' }
#'
#' @source The observations data were sourced from \href{https://uk-air.defra.gov.uk/networks/network-info?view=aurn}{the Automatic Urban and Rural Network},
#' \href{http://www.londonair.org.uk/LondonAir/Default.aspx}{the London Air Quality Network}, and
#' \href{http://www.airqualityengland.co.uk/}{Air Quality England}. All data are publicly available under the Open Government Licence (OGL).
#' © Crown 2018 copyright Defra via uk-air.defra.gov.uk, licenced under the Open Government Licence (OGL).
#' 
"london_nox_data"