ECharts 地图绘制

地图模拟实例（数据不具真实性仅供学习）

在绘制之前我们要了解一些Echarts的一些基本的组件：

1.geo
geo 是 ECharts 图表的地理坐标系组件。
ECharts 中地理坐标系组件可以用于地图的绘制，它支持在地理坐标系上绘制散点图，线集。

2.visualMap[i]
visualMap 是视觉映射组件，用于进行『视觉编码』，也就是将数据映射到视觉元素（视觉通道）。
视觉元素可以是：
- symbol: 图元的图形类别。
- symbolSize: 图元的大小。
- color: 图元的颜色。
- colorAlpha: 图元的颜色的透明度。
- opacity: 图元以及其附属物（如文字标签）的透明度。
- colorLightness: 颜色的明暗度，参见 HSL。
- colorSaturation: 颜色的饱和度，参见 HSL。
- colorHue: 颜色的色调，参见 HSL。
visualMap 组件可以定义多个，从而可以同时对数据中的多个维度进行视觉映射。

3.splitNumber
对于分段型视觉映射组件中的连续型数据，会自动平均切分成几段。默认为5段。连续数据的范围需要 max 和 min 来指定。

如果设置了 visualMap-piecewise.pieces 或者 visualMap-piecewise.categories，则 splitNumber 无效。

4.pieces
自定义『分段式视觉映射组件（visualMapPiecewise）』的每一段的范围，以及每一段的文字，以及每一段的特别的样式。例如：

pieces: [{gt: 500},            // (500, Infinity]{gt: 300, lte: 500},  // (300, 500]{gt: 100, lte: 300},{gt: 50, lte: 100},{gt: 10, lte: 50},{lt: 5}// (-Infinity, 5)],color: ['#d94e5d','#eac736','#50a3ba'],textStyle: {color: '#fff'}

或者，更精确得，可以使用 lt（小于，little than），gt（大于，greater than），lte（小于等于 lettle than or equals），gte（大于等于，greater than or equals）来表达边界：

5.legend.tooltip

图例的 tooltip 配置，配置项同 tooltip。默认不显示，可以在 legend 文字很多的时候对文字做裁剪并且开启 tooltip，如下示例：

  tooltip: {trigger: 'item',formatter: function (params) {return params.name + ' : ' + params.value[2];}}

效果图：

代码实例

<!DOCTYPE html>
<html style="height: 100%"><head><meta charset="utf-8"></head><body style="height: 100%; margin: 0"><div id="container" style="height: 100%"></div><script type="text/javascript" src="https://cdn.jsdelivr.net/npm/echarts/dist/echarts.min.js"></script><script type="text/javascript" src="https://cdn.jsdelivr.net/npm/echarts-gl/dist/echarts-gl.min.js"></script><script type="text/javascript" src="https://cdn.jsdelivr.net/npm/echarts-stat/dist/ecStat.min.js"></script><script type="text/javascript" src="https://cdn.jsdelivr.net/npm/echarts/dist/extension/dataTool.min.js"></script><script type="text/javascript" src="https://cdn.jsdelivr.net/npm/echarts/map/js/china.js"></script><script type="text/javascript" src="https://cdn.jsdelivr.net/npm/echarts/map/js/world.js"></script><script type="text/javascript" src="https://cdn.jsdelivr.net/npm/echarts/dist/extension/bmap.min.js"></script><script type="text/javascript">
var dom = document.getElementById("container");
var myChart = echarts.init(dom);
var app = {};
option = null;
var geoCoordMap = {"海门":[121.15,31.89],"鄂尔多斯":[109.781327,39.608266],"招远":[120.38,37.35],"舟山":[122.207216,29.985295],"齐齐哈尔":[123.97,47.33],"盐城":[120.13,33.38],"赤峰":[118.87,42.28],"青岛":[120.33,36.07],"乳山":[121.52,36.89],"金昌":[102.188043,38.520089],"泉州":[118.58,24.93],"莱西":[120.53,36.86],"日照":[119.46,35.42],"胶南":[119.97,35.88],"南通":[121.05,32.08],"拉萨":[91.11,29.97],"云浮":[112.02,22.93],"梅州":[116.1,24.55],"文登":[122.05,37.2],"上海":[121.48,31.22],"攀枝花":[101.718637,26.582347],"威海":[122.1,37.5],"承德":[117.93,40.97],"厦门":[118.1,24.46],"汕尾":[115.375279,22.786211],"潮州":[116.63,23.68],"丹东":[124.37,40.13],"太仓":[121.1,31.45],"曲靖":[103.79,25.51],"烟台":[121.39,37.52],"福州":[119.3,26.08],"瓦房店":[121.979603,39.627114],"即墨":[120.45,36.38],"抚顺":[123.97,41.97],"玉溪":[102.52,24.35],"张家口":[114.87,40.82],"阳泉":[113.57,37.85],"莱州":[119.942327,37.177017],"湖州":[120.1,30.86],"汕头":[116.69,23.39],"昆山":[120.95,31.39],"宁波":[121.56,29.86],"湛江":[110.359377,21.270708],"揭阳":[116.35,23.55],"荣成":[122.41,37.16],"连云港":[119.16,34.59],"葫芦岛":[120.836932,40.711052],"常熟":[120.74,31.64],"东莞":[113.75,23.04],"河源":[114.68,23.73],"淮安":[119.15,33.5],"泰州":[119.9,32.49],"南宁":[108.33,22.84],"营口":[122.18,40.65],"惠州":[114.4,23.09],"江阴":[120.26,31.91],"蓬莱":[120.75,37.8],"韶关":[113.62,24.84],"嘉峪关":[98.289152,39.77313],"广州":[113.23,23.16],"延安":[109.47,36.6],"太原":[112.53,37.87],"清远":[113.01,23.7],"中山":[113.38,22.52],"昆明":[102.73,25.04],"寿光":[118.73,36.86],"盘锦":[122.070714,41.119997],"长治":[113.08,36.18],"深圳":[114.07,22.62],"珠海":[113.52,22.3],"宿迁":[118.3,33.96],"咸阳":[108.72,34.36],"铜川":[109.11,35.09],"平度":[119.97,36.77],"佛山":[113.11,23.05],"海口":[110.35,20.02],"江门":[113.06,22.61],"章丘":[117.53,36.72],"肇庆":[112.44,23.05],"大连":[121.62,38.92],"临汾":[111.5,36.08],"吴江":[120.63,31.16],"石嘴山":[106.39,39.04],"沈阳":[123.38,41.8],"苏州":[120.62,31.32],"茂名":[110.88,21.68],"嘉兴":[120.76,30.77],"长春":[125.35,43.88],"胶州":[120.03336,36.264622],"银川":[106.27,38.47],"张家港":[120.555821,31.875428],"三门峡":[111.19,34.76],"锦州":[121.15,41.13],"南昌":[115.89,28.68],"柳州":[109.4,24.33],"三亚":[109.511909,18.252847],"自贡":[104.778442,29.33903],"吉林":[126.57,43.87],"阳江":[111.95,21.85],"泸州":[105.39,28.91],"西宁":[101.74,36.56],"宜宾":[104.56,29.77],"呼和浩特":[111.65,40.82],"成都":[104.06,30.67],"大同":[113.3,40.12],"镇江":[119.44,32.2],"桂林":[110.28,25.29],"张家界":[110.479191,29.117096],"宜兴":[119.82,31.36],"北海":[109.12,21.49],"西安":[108.95,34.27],"金坛":[119.56,31.74],"东营":[118.49,37.46],"牡丹江":[129.58,44.6],"遵义":[106.9,27.7],"绍兴":[120.58,30.01],"扬州":[119.42,32.39],"常州":[119.95,31.79],"潍坊":[119.1,36.62],"重庆":[106.54,29.59],"台州":[121.420757,28.656386],"南京":[118.78,32.04],"滨州":[118.03,37.36],"贵阳":[106.71,26.57],"无锡":[120.29,31.59],"本溪":[123.73,41.3],"克拉玛依":[84.77,45.59],"渭南":[109.5,34.52],"马鞍山":[118.48,31.56],"宝鸡":[107.15,34.38],"焦作":[113.21,35.24],"句容":[119.16,31.95],"北京":[116.46,39.92],"徐州":[117.2,34.26],"衡水":[115.72,37.72],"包头":[110,40.58],"绵阳":[104.73,31.48],"乌鲁木齐":[87.68,43.77],"枣庄":[117.57,34.86],"杭州":[120.19,30.26],"淄博":[118.05,36.78],"鞍山":[122.85,41.12],"溧阳":[119.48,31.43],"库尔勒":[86.06,41.68],"安阳":[114.35,36.1],"开封":[114.35,34.79],"济南":[117,36.65],"德阳":[104.37,31.13],"温州":[120.65,28.01],"九江":[115.97,29.71],"邯郸":[114.47,36.6],"临安":[119.72,30.23],"兰州":[103.73,36.03],"沧州":[116.83,38.33],"临沂":[118.35,35.05],"南充":[106.110698,30.837793],"天津":[117.2,39.13],"富阳":[119.95,30.07],"泰安":[117.13,36.18],"诸暨":[120.23,29.71],"郑州":[113.65,34.76],"哈尔滨":[126.63,45.75],"聊城":[115.97,36.45],"芜湖":[118.38,31.33],"唐山":[118.02,39.63],"平顶山":[113.29,33.75],"邢台":[114.48,37.05],"德州":[116.29,37.45],"济宁":[116.59,35.38],"荆州":[112.239741,30.335165],"宜昌":[111.3,30.7],"义乌":[120.06,29.32],"丽水":[119.92,28.45],"洛阳":[112.44,34.7],"秦皇岛":[119.57,39.95],"株洲":[113.16,27.83],"石家庄":[114.48,38.03],"莱芜":[117.67,36.19],"常德":[111.69,29.05],"保定":[115.48,38.85],"湘潭":[112.91,27.87],"金华":[119.64,29.12],"岳阳":[113.09,29.37],"长沙":[113,28.21],"衢州":[118.88,28.97],"廊坊":[116.7,39.53],"菏泽":[115.480656,35.23375],"合肥":[117.27,31.86],"武汉":[114.31,30.52],"大庆":[125.03,46.58]
};var convertData = function (data) {var res = [];for (var i = 0; i < data.length; i++) {var geoCoord = geoCoordMap[data[i].name];if (geoCoord) {res.push({name: data[i].name,value: geoCoord.concat(data[i].value)});}}return res;
};option = {backgroundColor: '#404a59',title: {text: '全国主要城市疫情模拟数据',subtext: 'This is simulated data',sublink: 'https://blog.csdn.net/qq_40896997',left: 'center',textStyle: {color: '#fff'}},tooltip: {trigger: 'item',formatter: function (params) {return params.name + ' : ' + params.value[2];}},legend: {orient: 'vertical',top: 'bottom',left: 'right',data:['感染人数'],textStyle: {color: '#fff'}},visualMap: {pieces: [{gt: 500},            // (500, Infinity]{gt: 300, lte: 500},  // (300, 500]{gt: 100, lte: 300},{gt: 50, lte: 100},{gt: 10, lte: 50},{lt: 5}// (-Infinity, 5)],color: ['#d94e5d','#eac736','#50a3ba'],textStyle: {color: '#fff'}},geo: {map: 'china',label: {emphasis: {show: false}},itemStyle: {normal: {areaColor: '#323c48',borderColor: '#111'},emphasis: {areaColor: '#2a333d'}}},series: [{name: '感染人数',type: 'scatter',coordinateSystem: 'geo',data: convertData([{name: "海门", value: 9},{name: "鄂尔多斯", value: 12},{name: "招远", value: 12},{name: "舟山", value: 12},{name: "齐齐哈尔", value: 14},{name: "盐城", value: 15},{name: "赤峰", value: 16},{name: "青岛", value: 18},{name: "乳山", value: 18},{name: "金昌", value: 19},{name: "泉州", value: 21},{name: "莱西", value: 21},{name: "日照", value: 21},{name: "胶南", value: 22},{name: "南通", value: 23},{name: "拉萨", value: 1},{name: "云浮", value: 24},{name: "梅州", value: 25},{name: "文登", value: 25},{name: "上海", value: 25},{name: "攀枝花", value: 25},{name: "威海", value: 25},{name: "承德", value: 25},{name: "厦门", value: 26},{name: "汕尾", value: 26},{name: "潮州", value: 26},{name: "丹东", value: 27},{name: "太仓", value: 27},{name: "曲靖", value: 27},{name: "烟台", value: 28},{name: "福州", value: 29},{name: "瓦房店", value: 30},{name: "即墨", value: 30},{name: "抚顺", value: 31},{name: "玉溪", value: 31},{name: "张家口", value: 31},{name: "阳泉", value: 31},{name: "莱州", value: 32},{name: "湖州", value: 32},{name: "汕头", value: 32},{name: "昆山", value: 33},{name: "宁波", value: 33},{name: "湛江", value: 33},{name: "揭阳", value: 34},{name: "荣成", value: 34},{name: "连云港", value: 35},{name: "葫芦岛", value: 35},{name: "常熟", value: 36},{name: "东莞", value: 36},{name: "河源", value: 36},{name: "淮安", value: 36},{name: "泰州", value: 36},{name: "南宁", value: 37},{name: "营口", value: 37},{name: "惠州", value: 37},{name: "江阴", value: 37},{name: "蓬莱", value: 37},{name: "韶关", value: 38},{name: "嘉峪关", value: 38},{name: "广州", value: 338},{name: "延安", value: 38},{name: "太原", value: 39},{name: "清远", value: 39},{name: "中山", value: 39},{name: "昆明", value: 39},{name: "寿光", value: 40},{name: "盘锦", value: 40},{name: "长治", value: 41},{name: "深圳", value: 388},{name: "珠海", value: 42},{name: "宿迁", value: 43},{name: "咸阳", value: 43},{name: "铜川", value: 44},{name: "平度", value: 44},{name: "佛山", value: 44},{name: "海口", value: 44},{name: "江门", value: 45},{name: "章丘", value: 45},{name: "肇庆", value: 46},{name: "大连", value: 47},{name: "临汾", value: 47},{name: "吴江", value: 47},{name: "石嘴山", value: 49},{name: "沈阳", value: 50},{name: "苏州", value: 50},{name: "茂名", value: 50},{name: "嘉兴", value: 51},{name: "长春", value: 51},{name: "胶州", value: 52},{name: "银川", value: 52},{name: "张家港", value: 52},{name: "三门峡", value: 53},{name: "锦州", value: 54},{name: "南昌", value: 54},{name: "柳州", value: 54},{name: "三亚", value: 54},{name: "自贡", value: 56},{name: "吉林", value: 56},{name: "阳江", value: 57},{name: "泸州", value: 57},{name: "西宁", value: 57},{name: "宜宾", value: 58},{name: "呼和浩特", value: 58},{name: "成都", value: 58},{name: "大同", value: 58},{name: "镇江", value: 59},{name: "桂林", value: 59},{name: "张家界", value: 59},{name: "宜兴", value: 59},{name: "北海", value: 60},{name: "西安", value: 61},{name: "金坛", value: 62},{name: "东营", value: 62},{name: "牡丹江", value: 63},{name: "遵义", value: 63},{name: "绍兴", value: 63},{name: "扬州", value: 64},{name: "常州", value: 64},{name: "潍坊", value: 65},{name: "重庆", value: 66},{name: "台州", value: 67},{name: "南京", value: 67},{name: "滨州", value: 70},{name: "贵阳", value: 71},{name: "无锡", value: 71},{name: "本溪", value: 71},{name: "克拉玛依", value: 72},{name: "渭南", value: 72},{name: "马鞍山", value: 72},{name: "宝鸡", value: 72},{name: "焦作", value: 75},{name: "句容", value: 75},{name: "北京", value: 79},{name: "徐州", value: 79},{name: "衡水", value: 80},{name: "包头", value: 80},{name: "绵阳", value: 80},{name: "乌鲁木齐", value: 84},{name: "枣庄", value: 84},{name: "杭州", value: 84},{name: "淄博", value: 85},{name: "鞍山", value: 86},{name: "溧阳", value: 86},{name: "库尔勒", value: 86},{name: "安阳", value: 90},{name: "开封", value: 90},{name: "济南", value: 92},{name: "德阳", value: 93},{name: "温州", value: 95},{name: "九江", value: 96},{name: "邯郸", value: 98},{name: "临安", value: 99},{name: "兰州", value: 99},{name: "沧州", value: 100},{name: "临沂", value: 103},{name: "南充", value: 104},{name: "天津", value: 105},{name: "富阳", value: 106},{name: "泰安", value: 112},{name: "诸暨", value: 112},{name: "郑州", value: 113},{name: "哈尔滨", value: 114},{name: "聊城", value: 116},{name: "芜湖", value: 117},{name: "唐山", value: 119},{name: "平顶山", value: 119},{name: "邢台", value: 119},{name: "德州", value: 120},{name: "济宁", value: 120},{name: "荆州", value: 127},{name: "宜昌", value: 130},{name: "义乌", value: 132},{name: "丽水", value: 133},{name: "洛阳", value: 134},{name: "秦皇岛", value: 136},{name: "株洲", value: 143},{name: "石家庄", value: 147},{name: "莱芜", value: 148},{name: "常德", value: 152},{name: "保定", value: 153},{name: "湘潭", value: 154},{name: "金华", value: 157},{name: "岳阳", value: 169},{name: "长沙", value: 175},{name: "衢州", value: 177},{name: "廊坊", value: 193},{name: "菏泽", value: 194},{name: "合肥", value: 229},{name: "武汉", value: 1473},{name: "大庆", value: 279}]),symbolSize: 12,label: {normal: {show: false},emphasis: {show: false}},itemStyle: {emphasis: {borderColor: '#fff',borderWidth: 1}}}]
};
if (option && typeof option === "object") {myChart.setOption(option, true);
}</script></body>
</html>

效果图