');
}
thunderforest_api_key = ''; // To display OpenStreetMap tiles from ThunderForest, you need a key (https://www.thunderforest.com/docs/apikeys/)
ign_api_key = ''; // To display topo tiles from IGN.fr, you need a key (https://api.ign.fr/)
This map was created using GPS Visualizer's do-it-yourself geographic utilities.