GADM 3.6 works in WGS84, but for area calculation or European mapping, reproject:
load("gadm36_sp.rda") # loads SpatialPolygonsDataFrame objects download gadm data version 36 work
: Traditional format compatible with almost all GIS software. KMZ (.kmz) : Ideal for viewing in Google Earth. : Specialized format for use with R programming. 2. Administrative Levels GADM data is structured into hierarchical levels: : National boundaries (Country level). : Primary subdivisions (e.g., States, Provinces). : Secondary subdivisions (e.g., Districts, Counties). Level 3 & Higher GADM 3
A classic format consisting of at least four files (.shp, .shx, .dbf, .prj). It is compatible with almost all GIS software. : Secondary subdivisions (e
Visit the GADM 3.6 World Download page to find the or Shapefile options. Alternative Methods for Developers
GADM v3.6 attribute names are clean but may include special characters (e.g., “São Paulo”). Use st_read(..., stringsAsFactors = FALSE) to avoid factor conversion issues.