Data Sources

Administrative boundaries on Viettrace are compiled from open datasets and updated to reflect the July 2025 administrative merger.

Where does the data come from?

About accuracy

  • Displayed boundaries are approximate and not official legal documents.
  • District and ward data may be incomplete in some areas.
  • Hoang Sa and Truong Sa are displayed based on OpenStreetMap data.

Found an issue?

If you spot a boundary error, incorrect name, or missing information, please report it so we can improve.

Report data issue
Viettrace — Bản đồ lịch sử Việt Nam