Nothing
#' Get natural earth world state (admin level 1) polygons
#'
#' returns state polygons (administrative level 1) for specified countries
#'
#' @inherit ne_download
#'
#' @param country a character vector of country names.
#' @param geounit a character vector of geounit names.
#' @param iso_a2 a character vector of iso_a2 country codes
#' @param spat_object an optional alternative states map
#'
#' @details
#' By default, this function uses the scale = 10 data from the
#' rnaturalearthhires package. While data at scales 50 and 110 exist,
#' they are not used as defaults because they contain fewer countries
#' (e.g. scale 50 only includes Australia, Brazil, Canada and United
#' States of America). For finer control, use \code{\link{ne_download}}.
#'
#' \code{ne_download( scale = 10L, type = "states", category = "cultural")}
#'
#' \code{ne_download( scale = 50L, type = "states", category = "cultural")}
#'
#' \code{ne_download( scale = 110L, type = "states", category = "cultural")}
#'
#' @aliases ne_admin1
#'
#' @examples
#'
#' # comparing using country and geounit to filter
#' if (requireNamespace("rnaturalearthhires")) {
#' spdf_france_country <- ne_states(country = "france")
#' spdf_france_geounit <- ne_states(geounit = "france")
#'
#' plot(spdf_france_country)
#' plot(spdf_france_geounit)
#'
#' plot(ne_states(country = "united kingdom"))
#' plot(ne_states(geounit = "england"))
#' }
#'
#' @export
ne_states <- function(
country = NULL,
geounit = NULL,
iso_a2 = NULL,
spat_object = NULL,
returnclass = c("sf", "sv")
) {
returnclass <- match.arg(returnclass)
if (returnclass == "sp") {
deprecate_sp("ne_download(returnclass = 'sp')")
}
# set map from one stored this adds potential to add or pass other potential
# state maps, e.g. without lakes but no checking is done, may not be needed
if (is.null(spat_object)) {
check_rnaturalearthhires()
spat_object <- rnaturalearthhires::states10
}
# set default filter
filter <- TRUE
# filter by country name (admin field in ne)
if (!is.null(country)) {
# check if field in data, for passed data or if changed in future
if (!("admin" %in% names(spat_object))) {
cli::cli_abort("No admin field in the data : {.val {names(spat_object)}}")
}
filter_country <- tolower(spat_object[["admin"]]) %in% tolower(country)
filter <- filter & filter_country
if (sum(filter_country) == 0L) {
cli::cli_abort("No such country ({.val {country}}) in the data.")
}
}
# filter by geounit
if (!is.null(geounit)) {
if (!("geonunit" %in% names(spat_object))) {
cli::cli_abort(
"No geonunit field in the data : {names(spat_object)}"
)
}
filter_geounit <- tolower(spat_object[["geonunit"]]) %in% tolower(geounit)
filter <- filter & filter_geounit
if (sum(filter_geounit) == 0L) {
cli::cli_abort("No such geounit ({.val {geounit}}) in the data.")
}
}
# filter by iso_a2
if (!is.null(iso_a2)) {
if (!("iso_a2" %in% names(spat_object))) {
cli::cli_abort(
"No {.var iso_a2} field in the data : {names(spat_object)}."
)
}
filter_iso_a2 <- tolower(spat_object[["iso_a2"]]) %in% tolower(iso_a2)
filter <- filter & filter_iso_a2
if (sum(filter_iso_a2) == 0L) {
cli::cli_abort("No such iso_a2 ({.val {iso_a2}}) in the data.")
}
}
# Convert to the desired class
convert_spatial_class(spat_object[filter, ], returnclass)
}
Any scripts or data that you put into this service are public.
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.