Sandbox - 01

{

 "origin": "bottom-left",
 "coordinateOrder": "xy",
 "mapImage": "File:MapBackground.jpg",
 "mapBounds": [[0, 0], [1000, 1000]],
 "categories": [
   { "id": "1", "name": "Artifacts", "color": "#ff00ff" },
   { "id": "2", "name": "Dungeons", "color": "#00ff00" }
 ],
 "markers": [
   {
     "categoryId": "1",
     "position": [500, 300],
     "popup": {
       "title": "A Sword",
       "description": "Very important artifact",
       "link": {
         "url": "Article about a sword",
         "label": "See more"
       }
     } 
   },
   {
     "categoryId": "2",
     "position": [300, 500],
     "popup": {
       "title": "A Cave",
       "description": "Very scary dungeon",
       "link": {
         "url": "Article about a cave",
         "label": "See more"
       }
     } 
   }
 ] 

}