{
    "icon": "roentgen-fort",
    "fields": [
        "name",
        "castle_type",
        "building_area_yes",
        "historic/civilization",
        "access_simple",
        "start_date"
    ],
    "moreFields": [
        "{historic}"
    ],
    "geometry": [
        "point",
        "area"
    ],
    "tags": {
        "historic": "castle"
    },
    "name": "Castle"
}