This is a community map of the Ethereum activities in Chiang Mai during around Devcon.
The design is by Chiang Mai artist Pailin Miro: https://www.instagram.com/pailin.miro
Edit map.js, set showLocator to true. This will show a marker that you can drag to find coordinates.
Then you can edit markers.
Send a PR, but remember to set showLocator to false before commiting.