Get Switzerland base maps data — bfs_get_base

This functions helps to get base maps data from the ThemaKart project as an sf object. The geom names and the general structure of the files can be found in the offical BFS documentation, see https://www.bfs.admin.ch/asset/en/24025645. When using this data, please read the condition of use and copyright mentions.

Usage

bfs_get_base_maps(
  geom = NULL,
  category = "gf",
  type = "Poly",
  date = NULL,
  most_recent = TRUE,
  format = "shp",
  asset_number = "24025646"
)

Arguments

geom: Geometry such as "suis", "kant", "bezk", "polg", "voge", etc.
category: Category such as 'total_area' ("gf" for "Gesamtflaeche") or 'vegetation_area' ("vf" for "Vegetationsflaeche").
type: The type of data, i.e. "Poly" or "Pnts".
date: Date (yyyymmdd) of reference / validity. If not specified, the `most_recent` argument is used.
most_recent: Get the most recent by sorting the files in decreasing order, if FALSE then read the first file available.
format: Format of the file, by default SHP format.
asset_number: Asset number of the base maps zip file.

Value

sf object with geometries. Returns NULL if no connection.

Details

If you want to get ThemaKart data from previous years, you can change the `asset_number` for the related zip file. For example, for the map set of year 2020, the asset number is "11927607".

This function is caching the base map data using `tools::R_user_dir(package = "BFS")`.