   "source-layer": "original",
        "paint": {
            "fill-outline-color": "#484896",
            "fill-color": "#6e599f",
            "fill-opacity": 0.75
        },
        "filter": ["in", "FIPS", ""]
    }, 'place-city-sm'); // Place polygon under these labels.

    // Set `true` to dispatch the event before other functions
    // call it. This is necessary for disabling the default map
    // dragging behaviour.
    canvas.addEventListener('mousedown', mouseDown, true);

    // Return the xy c