giscoR (version 0.3.1)

gisco_get_countries: Get GISCO world country sf polygons, points and lines

Description

Returns world country polygons, lines and points at a specified scale, as provided by GISCO. Also, specific areas as Gibraltar or Antarctica are presented separately. The definition of country used on GISCO correspond roughly with territories with an official ISO-3166 code.

Usage

gisco_get_countries(
  year = "2016",
  epsg = "4326",
  cache = TRUE,
  update_cache = FALSE,
  cache_dir = NULL,
  verbose = FALSE,
  resolution = "20",
  spatialtype = "RG",
  country = NULL,
  region = NULL
)

Arguments

year

Release year of the file. One of "2001", "2006", "2010", "2013", "2016" or "2020".

epsg

projection of the map: 4-digit EPSG code. One of:

• "4258": ETRS89

• "4326": WGS84

• "3035": ETRS89 / ETRS-LAEA

• "3857": Pseudo-Mercator

cache

A logical whether to do caching. Default is TRUE. See About caching.

update_cache

A logical whether to update cache. Default is FALSE. When set to TRUE it would force a fresh download of the source .geojson file.

cache_dir

A path to a cache directory. See About caching.

verbose

Logical, displays information. Useful for debugging, default is FALSE.

resolution

Resolution of the geospatial data. One of

• "60": 1:60million

• "20": 1:20million

• "10": 1:10million

• "03": 1:3million

• "01": 1:1million

spatialtype

Type of geometry to be returned:

• "BN": Boundaries - LINESTRING object.

• "COASTL": coastlines - LINESTRING object.

• "INLAND": inland boundaries - LINESTRING object.

• "LB": Labels - POINT object.

• "RG": Regions - MULTIPOLYGON/POLYGON object.

country

Optional. A character vector of country codes. It could be either a vector of country names, a vector of ISO3 country codes or a vector of Eurostat country codes. Mixed types (as c("Turkey","US","FRA")) would not work. See also countrycode::countrycode().

region

Optional. A character vector of UN M49 region codes or European Union membership. Possible values are "Africa", "Americas", "Asia", "Europe", "Oceania" or "EU" for countries belonging to the European Union (as per 2021). See About world regions and gisco_countrycode

Value

A sf object specified by spatialtype.

About caching

You can set your cache_dir with gisco_set_cache_dir().

Sometimes cached files may be corrupt. On that case, try re-downloading the data setting update_cache = TRUE.

If you experience any problem on download, try to download the corresponding .geojson file by any other method and save it on your cache_dir. Use the option verbose = TRUE for debugging the API query.

For a complete list of files available check gisco_db.

World Regions

Regions are defined as per the geographic regions defined by the UN (see https://unstats.un.org/unsd/methodology/m49/. Under this scheme Cyprus is assigned to Asia. You may use region = "EU" to get the EU members (reference date: 2021).

See Also

gisco_countrycode(), gisco_countries, countrycode::countrycode()

Other political: gisco_bulk_download(), gisco_get_coastallines(), gisco_get_lau(), gisco_get_nuts(), gisco_get_postalcodes(), gisco_get_units(), gisco_get_urban_audit()

Examples

# NOT RUN {
cntries <- gisco_get_countries()

library(ggplot2)
ggplot(cntries) +
  geom_sf()

# Get a region

africa <- gisco_get_countries(region = "Africa")
ggplot(africa) +
  geom_sf(fill = "#078930", col = "white") +
  theme_minimal()
# }
# NOT RUN {
if (gisco_check_access()) {
  # Extract points
  asia_pol <- gisco_get_countries(region = "Asia", resolution = "3")
  asia_lb <- gisco_get_countries(spatialtype = "LB", region = "Asia")
  ggplot(asia_pol) +
    geom_sf(fill = "gold3") +
    geom_sf(data = asia_lb, color = "#007FFF")
}
# }