[
  {
    "type": "mapgen",
    "update_mapgen_id": "mx_portal_dino_south_america",
    "object": {
      "place_nested": [ { "chunks": [ "portal_location" ], "x": [ 2, 20 ], "y": [ 2, 20 ] } ],
      "monsters": { " ": { "monster": "GROUP_DINOSAUR_SOUTH_AMERICA", "chance": 1, "density": 0.0001 } }
    }
  },
  {
    "type": "mapgen",
    "update_mapgen_id": "mx_portal_dino_asia",
    "object": {
      "place_nested": [ { "chunks": [ "portal_location" ], "x": [ 2, 20 ], "y": [ 2, 20 ] } ],
      "monsters": { " ": { "monster": "GROUP_DINOSAUR_ASIA", "chance": 1, "density": 0.0001 } }
    }
  },
  {
    "type": "mapgen",
    "update_mapgen_id": "mx_portal_dino_europe",
    "object": {
      "place_nested": [ { "chunks": [ "portal_location" ], "x": [ 2, 20 ], "y": [ 2, 20 ] } ],
      "monsters": { " ": { "monster": "GROUP_DINOSAUR_EUROPE", "chance": 1, "density": 0.0001 } }
    }
  }
]
