Below is visualization of the GIS border data we have for Tonga. Features include:

• Simplified to load quickly with minimal loss of detail (25.7 KB .json file).
• License: Creative Commons Attribution 4.0
• First-level administrative regions identified by name and id in the source code.
• All files use WGS84 projection. Easily reproject as needed.

Included Administrative Regions

{
    "TO01": "Eua", 
    "TO02": "Ha'apai", 
    "TO03": "Niuas", 
    "TO04": "Tongatapu", 
    "TO05": "Vava'u"
}