{
    "version": 8,
    "sources": {
        "land": {
            "type": "vector",
            "url": "mbtiles://land",
            "tileSize": 256
        },
        "basemap": {
            "type": "raster",
            "url": "mbtiles://geography-class-png",
            "tileSize": 256
        }
    },
    "layers": [
        {
            "id": "basemap",
            "type": "raster",
            "source": "basemap"
        },
        {
            "id": "land",
            "type": "fill",
            "source": "land",
            "source-layer": "land",
            "paint": {
                "fill-color": "#AAAAAA",
                "fill-opacity": 1
            }
        }
    ]
}