#' GFCM sub areas (mixed area codes)
#'
#' General Fisheries Commission for the Mediterranean - GFCM area coding system (FAO Major Fishing Area 37)
#' Polygons are defined on for Divisions, and the Geographic Subareas are annotated in the column F_SUBAREA.
#'
#' Polygons are defined in WGS84 coordinates (unprojected).
#'
#' The data contains the following columns with rows for each area:
#' \describe{
#' \item{F_AREA}{FAO Major fishing Area (37)}
#' \item{F_SUBAREA}{The GSAs (Geographical subareas)}
#' \item{F_DIVISION}{The GFCM divisions, subdividing the GSAs.}
#' }
#'
#'
#' @docType data
#'
#' @usage data(GSAsubArea)
#'
#' @format \code{\link[sp]{SpatialPolygonsDataFrame}} with area names identified in the column 'StratumName'. See \code{\link[RstoxBase]{StratumPolygon}}.
#'
#' @concept area code polygons
#' @keywords datasets
#'
#'
#' @examples
#' # plot divisions
#' data(GSAsubArea)
#' plotArea(areaDef=GSAsubArea)
#'
#' # plot subareas
#' RstoxFDA::plotArea(areaDef=GSAsubArea, areaNameCol = "F_SUBAREA")
"GSAsubArea"
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