I already tracked chests and collectibles on another interactive map (like appsample). Can I import that progress into TH.GL?

Yes — for supported games you can bring your found markers over in a one-time copy. It matches the other site's markers to the same locations on our map and marks them as discovered here.

Supported today: appsample → Wuthering Waves. More sites/games will follow.

1. On the TH.GL map, open Settings → Discovered Nodes and click Import from another site.
2. Follow the on-screen steps to export from the other site (see below), then paste the result into the box.
3. Review the matched groups and choose Merge (keep what you already have) or Replace all.

The other site stores your progress in your signed-in account, so the export has to run in a desktop browser (mobile browsers have no developer console):

1. Open the appsample map on a computer and sign in with the same Google account.
2. Press F12 → Console tab.
3. Paste the snippet shown in the TH.GL import dialog and press Enter. (If the browser blocks the paste, type allow pasting first.)
4. It copies your found markers to the clipboard — paste them back into the TH.GL import box.

• Only marker types we have on our map can be matched (e.g. chests, tidal heritages, sonance caskets). Anything we don't track, or areas not yet supported, is skipped — the dialog tells you how many.
• Discovered markers are stored per device (they aren't cloud-synced), so import on each device you use, or use Backup/Restore in the same settings section to copy them across.