R/popupunits.R

In ejanalysis/ejscreen: EJScreen Tools for US EPA Environmental Justice (EJ) Mapping and Screening

#' @name popupunits
#' @docType data
#' @title Units of measurement for environmental indicators
#' @description Table indicating what units to use, such as ug/m3,
#'   in showing environmental indicators in EJSCREEN, as shown in popup windows on maps
#' @usage data('popupunits')
#' @source See related Technical Documentation at \url{http://www.epa.gov/ejscreen}
#' @seealso  \code{\link{make.popup.e}} \code{\link{names.e}}
#' @format A data.frame: \cr\cr
#' > \code{ str(popupunits)
#' 'data.frame':	11 obs. of  2 variables:
#' $ evar : chr  "pm" "o3" "cancer"  ...
#' $ units: chr  "ug/m3" "ppb" "lifetime risk per million" "" ...
#' > popupunits
#'               evar                          units
#' 1               pm                          ug/m3
#' 2               o3                            ppb
#' 3           cancer      lifetime risk per million
#' 4             resp
#' 5              dpm                          ug/m3
#' 6       pctpre1960            = fraction pre-1960
#' 7    traffic.score daily vehicles/meters distance
#' 8    proximity.npl              sites/km distance
#' 9    proximity.rmp         facilities/km distance
#' 10  proximity.tsdf         facilities/km distance
#' 11 proximity.npdes         facilities/km distance
#' }
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