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Map with user-selected locations marked.

To create a map of Japan with locations added, load a txt-file that only contains locations (one for each row) as shown below:

35.69,139.75,1.5,black,Tokyo
31.59,130.66,3,green,Sakurajima
34.99,135.76,2.0

Each row should be on the format

Latitude,Longitude,Marker-size,Marker-color,Marker-name

The last two properties can be omitted as shown for the last row (it's Kyoto). To clear selection, reload the page. The blank map can be found here, and was created by Maximilian Dörrbecker and shared with CC BY-SA 3.0.