I'd look at the OpenStreetMap uploader. It grabs an image of the map and then converts it to tiles and uploads them, with a bit of metadata to say what area they're for:
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
I'd look at the OpenStreetMap uploader. It grabs an image of the map and then converts it to tiles and uploads them, with a bit of metadata to say what area they're for:
https://github.com/espruino/BangleApps/blob/master/apps/openstmap/interface.html#L251-L296
So basically what you want is to call the code above on your festival map image, then to create the JSON for it: https://github.com/espruino/BangleApps/blob/master/apps/openstmap/interface.html#L384-L394
And then magically the existing openstmap app would do everything for you...
OR... you could use that tiling code to make an image for your own app - rendering it is nice and easy: https://github.com/espruino/BangleApps/blob/master/apps/openstmap/openstmap.js#L74-L80