Some mirrors have removed v3.6. Then use:
gadm_data <- gadm(country = "ITA", level = 1, path = tempdir(), version = "3.6")
Construct the URL using the pattern https://geodata.ucdavis.edu/gadm/gadm3.6/shp/gadm36_$COUNTRY_shp.zip . This is the method used by most programmatic download scripts for GADM v3.6. download gadm data version 36 work
Geospatial datasets regularly shift as political boundaries evolve. Version 3.6 represents a highly stable snapshot of global administrative frameworks.
Understanding how GADM layers "work" requires understanding its numeric subdivision levels: Outer country boundary. Level 1: States, provinces, or primary regions. Level 2: Counties, districts, or local municipalities. Some mirrors have removed v3
The GADM website provides two primary methods for downloading version 3.6 data: single-country downloads and entire-world packages.
Remember to respect the licensing terms, choose the appropriate level of detail for your analysis, and leverage the programmatic approaches in Python and R to streamline your workflow. Level 1: States, provinces, or primary regions
GADM version 3.6 (released May 6, 2018) is a foundational dataset for spatial analysis, delimiting 386,735 administrative areas worldwide. While newer versions like 4.1 exist, 3.6 remains widely used due to its stable system, which was specifically fixed in this release after errors in version 3.4. How to Download Version 3.6