echarts map 阴影（重叠）

export const dfOption = {
  tooltip: {
    formatter: function(params, ticket, callback) {
      return params.name + "：" + params.value;
    } // 数据格式化
  },
  visualMap: {
    min: 0,
    max: 100,
    right: 10,
    top: "bottom",
    itemWidth: 10,
    text: ["100", "数量"], // 取值范围的文字
    textStyle: {
      color: "#fff",
      fontSize: "10"
    },
    inRange: {
      color: ["#f8f2f6 ", "#4d3998", "#442a53", "#963062", "#783164", "#6e294f"] // 取值范围的颜色
    },
    show: true // 图注
  },
  geo: {
    map: "df",
    roam: false, // 不开启缩放和平移
    zoom: 1.1, // 视角缩放比例
    top: 50,
    aspectScale: 1.5,
    label: {
      normal: {
        show: false,
        fontSize: "10",
        color: "rgba(0,0,0,0.7)"
      }
    },
    itemStyle: {
      normal: {
        areaColor: "#CDDCEF",
        borderColor: "#506FDB",
        borderWidth: 1,
        borderType: "solid",
        opacity: 0.8,
        shadowBlur: 10,
        shadowColor: "#080D15",
        shadowOffsetX: 5,
        shadowOffsetY: 5,
      },
      emphasis: {
        areaColor: {
          type: "linear",
          x: 0,
          y: 0,
          x2: 0,
          y2: 1,
          colorStops: [{
            offset: 0, color: "#fff" // 0% 处的颜色
          }, {
            offset: 1, color: "#fff" // 100% 处的颜色
          }],
          globalCoord: false // 缺省为 false
        }
      }
    },
  },
  series: [
    {
      type: "map",
      geoIndex: 1,
      aspectScale: 1.5,
      map: "df",
      zoom: 1.1,
      top: 44,
      roam: false,
      nameProperty: "name",
      selectMode: "single",
      label: {
        normal: {
          show: true,
          fontSize: "12",
          color: "#D4D6DD"
        }
      },
      itemStyle: {
        normal: {
          borderColor: "#506FDB",
          borderWidth: "0.5",
          shadowBlur: 5,
          shadowColor: "#999",
          shadowOffsetX: 5,
          shadowOffsetY: 5,
        },
        emphasis: {
          areaColor: {
            type: "linear",
            x: 0,
            y: 0,
            x2: 0,
            y2: 1,
            colorStops: [{
              offset: 0, color: "#fff" // 0% 处的颜色
            }, {
              offset: 1, color: "#fff" // 100% 处的颜色
            }],
            globalCoord: false // 缺省为 false
          }
        }
      },
      data: []
    }
  ]
};

　　

主要在于geo 与 series 两层重叠的处理。