           max: 18,
            min: 5
        },
    });
    var overlay = new inMap.PointOverlay({
        tooltip: {
            show: true,
            formatter: "{count}"
        },
        legend: {
            show: true,
            data: ["描述1", "描述2", "描述3", "描述4"],
            //legned 回调
            formatter: function (val, index, item) {
                return val + "万";
            }
        },
        style: {
            normal: {
                backgroundColor: "rgb