echarts 中使用中国地图 前台调试工具持续报错： Uncaught DOMException: Failed to execute 'drawImage' on 'CanvasRenderingContext2D': The image argument is a canvas element with a width or height of 0，

问题背景：

　　因为自己需要，展示中国地图的航飞路线，  在制作大屏的过程中   需要在中心的位置 

初始如下图：

现在想要将重心位置放置一个模拟飞行航线的地图  Echarts链接：https://gallery.echartsjs.com/editor.html?c=x0-ExSkZDM ，打开链接 可见 如下图

 想要将这个图添加到大屏的中央位置

代码如下：

HTML部分

     <!--中间下方的地图模块-->
        <div class="map">
                <div class="map1"></div>
                <div class="map2"></div>
                <div class="map3"></div>
                <div class="chart" style=" 100%;height: 500px;"></div>

        </div>

index.js部分  

(function (){
    var myChart = echarts.init(document.querySelector(".map .chart"));
    var geoCoordMap = {
        '上海': [121.4648,31.2891],
        '东莞': [113.8953,22.901],
        '东营': [118.7073,37.5513],
        '中山': [113.4229,22.478],
        '临汾': [111.4783,36.1615],
        '临沂': [118.3118,35.2936],
        '丹东': [124.541,40.4242],
        '丽水': [119.5642,28.1854],
        '乌鲁木齐': [87.9236,43.5883],
        '佛山': [112.8955,23.1097],
        '保定': [115.0488,39.0948],
        '兰州': [103.5901,36.3043],
        '包头': [110.3467,41.4899],
        '北京': [116.4551,40.2539],
        '北海': [109.314,21.6211],
        '南京': [118.8062,31.9208],
        '南宁': [108.479,23.1152],
        '南昌': [116.0046,28.6633],
        '南通': [121.1023,32.1625],
        '厦门': [118.1689,24.6478],
        '台州': [121.1353,28.6688],
        '合肥': [117.29,32.0581],
        '呼和浩特': [111.4124,40.4901],
        '咸阳': [108.4131,34.8706],
        '哈尔滨': [127.9688,45.368],
        '唐山': [118.4766,39.6826],
        '嘉兴': [120.9155,30.6354],
        '大同': [113.7854,39.8035],
        '大连': [122.2229,39.4409],
        '天津': [117.4219,39.4189],
        '太原': [112.3352,37.9413],
        '威海': [121.9482,37.1393],
        '宁波': [121.5967,29.6466],
        '宝鸡': [107.1826,34.3433],
        '宿迁': [118.5535,33.7775],
        '常州': [119.4543,31.5582],
        '广州': [113.5107,23.2196],
        '廊坊': [116.521,39.0509],
        '延安': [109.1052,36.4252],
        '张家口': [115.1477,40.8527],
        '徐州': [117.5208,34.3268],
        '德州': [116.6858,37.2107],
        '惠州': [114.6204,23.1647],
        '成都': [103.9526,30.7617],
        '扬州': [119.4653,32.8162],
        '承德': [117.5757,41.4075],
        '拉萨': [91.1865,30.1465],
        '无锡': [120.3442,31.5527],
        '日照': [119.2786,35.5023],
        '昆明': [102.9199,25.4663],
        '杭州': [119.5313,29.8773],
        '枣庄': [117.323,34.8926],
        '柳州': [109.3799,24.9774],
        '株洲': [113.5327,27.0319],
        '武汉': [114.3896,30.6628],
        '汕头': [117.1692,23.3405],
        '江门': [112.6318,22.1484],
        '沈阳': [123.1238,42.1216],
        '沧州': [116.8286,38.2104],
        '河源': [114.917,23.9722],
        '泉州': [118.3228,25.1147],
        '泰安': [117.0264,36.0516],
        '泰州': [120.0586,32.5525],
        '济南': [117.1582,36.8701],
        '济宁': [116.8286,35.3375],
        '海口': [110.3893,19.8516],
        '淄博': [118.0371,36.6064],
        '淮安': [118.927,33.4039],
        '深圳': [114.5435,22.5439],
        '清远': [112.9175,24.3292],
        '温州': [120.498,27.8119],
        '渭南': [109.7864,35.0299],
        '湖州': [119.8608,30.7782],
        '湘潭': [112.5439,27.7075],
        '滨州': [117.8174,37.4963],
        '潍坊': [119.0918,36.524],
        '烟台': [120.7397,37.5128],
        '玉溪': [101.9312,23.8898],
        '珠海': [113.7305,22.1155],
        '盐城': [120.2234,33.5577],
        '盘锦': [121.9482,41.0449],
        '石家庄': [114.4995,38.1006],
        '福州': [119.4543,25.9222],
        '秦皇岛': [119.2126,40.0232],
        '绍兴': [120.564,29.7565],
        '聊城': [115.9167,36.4032],
        '肇庆': [112.1265,23.5822],
        '舟山': [122.2559,30.2234],
        '苏州': [120.6519,31.3989],
        '莱芜': [117.6526,36.2714],
        '菏泽': [115.6201,35.2057],
        '营口': [122.4316,40.4297],
        '葫芦岛': [120.1575,40.578],
        '衡水': [115.8838,37.7161],
        '衢州': [118.6853,28.8666],
        '西宁': [101.4038,36.8207],
        '西安': [109.1162,34.2004],
        '贵阳': [106.6992,26.7682],
        '连云港': [119.1248,34.552],
        '邢台': [114.8071,37.2821],
        '邯郸': [114.4775,36.535],
        '郑州': [113.4668,34.6234],
        '鄂尔多斯': [108.9734,39.2487],
        '重庆': [107.7539,30.1904],
        '金华': [120.0037,29.1028],
        '铜川': [109.0393,35.1947],
        '银川': [106.3586,38.1775],
        '镇江': [119.4763,31.9702],
        '长春': [125.8154,44.2584],
        '长沙': [113.0823,28.2568],
        '长治': [112.8625,36.4746],
        '阳泉': [113.4778,38.0951],
        '青岛': [120.4651,36.3373],
        '韶关': [113.7964,24.7028]
    };

    var XAData = [
        [{name:'西安'}, {name:'北京',value:100}],
        [{name:'西安'}, {name:'上海',value:100}],
        [{name:'西安'}, {name:'广州',value:100}],
        [{name:'西安'}, {name:'西宁',value:100}],
        [{name:'西安'}, {name:'银川',value:100}]
    ];

    var XNData = [
        [{name:'西宁'}, {name:'北京',value:100}],
        [{name:'西宁'}, {name:'上海',value:100}],
        [{name:'西宁'}, {name:'广州',value:100}],
        [{name:'西宁'}, {name:'西安',value:100}],
        [{name:'西宁'}, {name:'银川',value:100}]
    ];

    var YCData = [
        [{name:'银川'}, {name:'北京',value:100}],
        [{name:'银川'}, {name:'广州',value:100}],
        [{name:'银川'}, {name:'上海',value:100}],
        [{name:'银川'}, {name:'西安',value:100}],
        [{name:'银川'}, {name:'西宁',value:100}],
    ];

    var planePath = 'path://M1705.06,1318.313v-89.254l-319.9-221.799l0.073-208.063c0.521-84.662-26.629-121.796-63.961-121.491c-37.332-0.305-64.482,36.829-63.961,121.491l0.073,208.063l-319.9,221.799v89.254l330.343-157.288l12.238,241.308l-134.449,92.931l0.531,42.034l175.125-42.917l175.125,42.917l0.531-42.034l-134.449-92.931l12.238-241.308L1705.06,1318.313z';
    //var planePath = 'arrow';
    var convertData = function (data) {

        var res = [];
        for (var i = 0; i < data.length; i++) {

            var dataItem = data[i];

            var fromCoord = geoCoordMap[dataItem[0].name];
            var toCoord = geoCoordMap[dataItem[1].name];
            if (fromCoord && toCoord) {
                res.push({
                    fromName: dataItem[0].name,
                    toName: dataItem[1].name,
                    coords: [fromCoord, toCoord],
                    value: dataItem[1].value
                });
            }
        }
        return res;

    };

    var color = ['#a6c84c', '#ffa022', '#46bee9'];//航线的颜色
    var series = [];
    [['西安', XAData], ['西宁', XNData], ['银川', YCData]].forEach(function (item, i) {
        series.push({
                name: item[0] + ' Top3',
                type: 'lines',
                zlevel: 1,
                effect: {
                    show: true,
                    period: 6,
                    trailLength: 0.7,
                    color: 'red',   //arrow箭头的颜色
                    symbolSize: 3
                },
                lineStyle: {
                    normal: {
                        color: color[i],
                         0,
                        curveness: 0.2
                    }
                },
                data: convertData(item[1])
            },
            {
                name: item[0] + ' Top3',
                type: 'lines',
                zlevel: 2,
                symbol: ['none', 'arrow'],
                symbolSize: 10,
                effect: {
                    show: true,
                    period: 6,
                    trailLength: 0,
                    symbol: planePath,
                    symbolSize: 15
                },
                lineStyle: {
                    normal: {
                        color: color[i],
                         1,
                        opacity: 0.6,
                        curveness: 0.2
                    }
                },
                data: convertData(item[1])
            },
            {
                name: item[0] + ' Top3',
                type: 'effectScatter',
                coordinateSystem: 'geo',
                zlevel: 2,
                rippleEffect: {
                    brushType: 'stroke'
                },
                label: {
                    normal: {
                        show: true,
                        position: 'right',
                        formatter: '{b}'
                    }
                },
                symbolSize: function (val) {
                    return val[2] / 8;
                },
                itemStyle: {
                    normal: {
                        color: color[i],
                    },
                    emphasis: {
                        areaColor: '#2B91B7'
                    }
                },
                data: item[1].map(function (dataItem) {
                    return {
                        name: dataItem[1].name,
                        value: geoCoordMap[dataItem[1].name].concat([dataItem[1].value])
                    };
                })
            });
    });
    var option = {
        backgroundColor: '#000',
        title : {
            text: '模拟航线',
            subtext: '数据纯属虚构',
            left: 'center',
            textStyle : {
                color: '#fff'
            }
        },
        tooltip : {
            trigger: 'item',
            formatter:function(params, ticket, callback){
                if(params.seriesType=="effectScatter") {
                    return "线路："+params.data.name+""+params.data.value[2];
                }else if(params.seriesType=="lines"){
                    return params.data.fromName+">"+params.data.toName+"<br />"+params.data.value;
                }else{
                    return params.name;
                }
            }
        },
        legend: {
            orient: 'vertical',
            top: 'bottom',
            left: 'right',
            data:['西安 Top3', '西宁 Top3', '银川 Top3'],
            textStyle: {
                color: '#fff'
            },
            selectedMode: 'multiple'
        },
        geo: {
            map: 'china',
            label: {
                emphasis: {
                    show: true,
                    color:'#fff'
                }
            },
            roam: true,
            itemStyle: {
                normal: {
                    areaColor: '#00186E',
                    borderColor: '#195BB9',
                    borderWidth: 1,
                },
                emphasis: {
                    areaColor: '#2B91B7'
                }
            }
        },
        series: series
    };
    //3.把配置项和数据给实例对象
    // myChart.setOption(option);

})();

出现的现象，index.js中的第3步总是报错：

Uncaught DOMException: Failed to execute 'drawImage' on 'CanvasRenderingContext2D': The image argument is a canvas element with a width or height of 0，

具体的原因：

报错大概是在绘制图形时画布大小为0，检查之后发现该图给了宽高，而且迁徙图也是被绘制出来的，然后我试了下把写在css样式文件中的宽高设置给在了行内，这样就好了

也就是把将要放置地图的div  设置一个高度和宽度即可！

参考链接：https://blog.csdn.net/deciduous_leaves/article/details/106762983