Download __link__ Gadm Data Version 36 Work
How to Download and Work with GADM Data Version 3.6 Introduction The Global Administrative Areas (GADM) database is a high-resolution map of administrative areas (e.g., countries, provinces, districts) worldwide. Version 3.6 is one of the most widely used releases because it balances recency, stability, and compatibility with older GIS software. However, the GADM website has changed over time, and working with the data requires understanding its license, file formats, and potential pitfalls. This essay provides a complete workflow: downloading GADM v3.6, verifying the download, loading it into common tools (R, QGIS, Python), and addressing common issues like file corruption and encoding problems.
Step 1: Locating and Downloading GADM v3.6 GADM data is available at https://gadm.org . However, the site defaults to the latest version (currently v4.1+). To get version 3.6 specifically:
Go to https://gadm.org/download_world36.html – this legacy link still works for v3.6. Alternatively, on the main download page, look for “Old versions” or directly modify the URL: https://gadm.org/data/36/ .
You have two main download options:
Country-specific : Choose a country → select “Geopackage” (.gpkg) or “Shapefile” (.shp). Recommendation: Use GeoPackage – it is a single file, fewer corruption issues.
Entire world : The full dataset is split into six zip files (e.g., gadm36_levels.shp.zip ). Only download if you need global data – each file is ~500 MB.
File naming convention for v3.6:
gadm36_XXX_0.shp → country XXX at level 0 (country boundary) gadm36_XXX_1.shp → level 1 (e.g., states/provinces) gadm36_XXX_2.shp → level 2 (districts) Levels go up to 5 for some countries.
Note: GADM 3.6 uses the ISO3 country code (e.g., USA, FRA, IND). You can find the code list inside the downloaded zip or online.
Step 2: Verifying Download Integrity GADM files are often large and can corrupt during download. Before unpacking, verify the MD5 checksum (provided on the download page next to each file). On Windows (PowerShell): Get-FileHash -Algorithm MD5 .\gadm36_USA_0_gpkg.zip download gadm data version 36 work
On macOS/Linux: md5sum gadm36_USA_0_gpkg.zip
If the hash matches, proceed. If not, re-download.
