main/trees.json

{
    "type": "category",
    "query": "node[natural=tree];",
    "style": {
          "nodeFeature": "CircleMarker",
          "color": "red",
          "fillColor": "red",
          "fillOpacity": 0.1,
          "weight": 1,
          "radius": 6
    },
    "marker": {
        "iconUrl": "img/map_pointer.png",
        "iconSize": [ 25, 42 ],
        "iconAnchor": [ 13, 42 ]
    },
    "minZoom": 17,
    "featureTitle": "{{ tags.species|default('Tree') }}"
}