根据城市名称获取Echarts地图区域的页面xy信息

  let  mapEvent = null  //地图实例
  let  cityName = '济南'
  let  tableData = [
                {cityName:"济南",value:10},
                {cityName:"青岛",value:10},
            ]
  // 获取地市下标
  const cityDataIndex = tableData.value.findIndex(
    item => item.cityName === cityName
  );
  // 获取地图的 geo 组件
  const geoComponent = mapEvent.value.getModel().getComponent('geo', 1);
  // 获取城市在地图上的像素坐标
  const pixelCoord = geoComponent.coordinateSystem.dataToPoint(cityName);
  const clickParams = {
    name: cityName,
    dataIndex: cityDataIndex,
    event: {
      offsetX: pixelCoord[0],
      offsetY: pixelCoord[1],
    },
  };