GADM data is natively provided in geographic coordinates (WGS84, EPSG:4326). If you need to calculate accurate surface areas or distances, project your layers into a local Projected Coordinate System (like UTM) first. To help find the exact data you need, please let me know: Which country or region are you mapping?
The GADM loader plugin provides a more integrated experience:
GADM 3.6 boundaries are high-resolution (often >1 MB per province). Use simplification before serving tiles: download gadm data version 36 work
I clicked the link next to the country name.
. Note that these are very large files and may take significant time to download. Available Data Formats GADM data is natively provided in geographic coordinates
GADM allows you to download data for the entire world as a single dataset or split by individual countries. For most projects, downloading by country is faster and saves local disk space. Select your target country from the dropdown menu. Choose your preferred file format. 3. Choose the Right File Format
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. The GADM loader plugin provides a more integrated
GADM 3.6 data is available in several formats. Choose the one that matches your software:
GADM is a high-resolution spatial database of country and lower-level administrative boundaries (states, provinces, districts, etc.). Version 3.6, released in 2022–2023, includes updates to boundaries for dozens of countries, corrected geometries, and improved attribute naming consistency.
Look for the link labeled or go directly to the version 3.6 subpage if prompted. Step 2: Choose Your Download Strategy GADM provides two ways to download version 3.6 data: