本次实验通过可视化工具Echarts来对全国主要城市的ＰＭ2.5的值进行直观的展示，使人们可以快速的发现信息的关键点，从而对各个城市的空气质量情况有直观的了解。
先看效果
上代码：
<!DOCTYPE html>
<html><head><meta charset="utf-8" /><!-- <meta charset="GB2312" /> --><!-- 引入刚刚下载的 ECharts 文件 --><script src="js/echarts/echarts.min.js"></script><script type="text/javascript" src="js/echarts/china.js"></script><script type="text/javascript" src="js/jquery.min.js"></script></head><body><!-- 为 ECharts 准备一个定义了宽高的 DOM --><!-- //图形在网页的长宽 DOM --><div id="main" style="width: 90%;height: 800px;"></div><script type="text/javascript">// 基于准备好的dom，初始化echarts实例var myChart = echarts.init(document.getElementById('main'));<!-- Step 1：加载主要城市经纬度数据 -->var cityCoordData = null;// $.ajax(// {// url :'dtData.json',// async:false,// dataType:"json",// success:function(data){// cityCoordData = data;// }// }); //ajax_endcityCoordData = {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]};<!-- Step 2: 加载主要城市PM2.5数据 -->var pmData = null;// $.ajax(// {// url : 'pmData.json',// async:false,// dataType:"json",// success:function(data){// pmData = data.pmData;// }// });//ajax_endpmData = [{ 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: 24 },{ 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: 38 },{ 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: 41 },{ 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: 273 },{ name: '大庆', value: 279 }];<!-- Step 3: 对数据进行处理 -->var convertData = function getData(pmData){var res = [];for(var i=0;i<pmData.length;i++){var cityName = pmData[i].name;var cityCoord = cityCoordData[cityName];var cityValue = pmData[i].value;cityCoord.push(cityValue);res.push({name:cityName,value:cityCoord});}return res;};var option = {<!-- geo是地理坐标系组件 -->geo: {map:'china',roam: true,itemStyle:{normal:{areaColor: '#323c48',borderColor: '#404a59'},emphasis:{areaColor: '#2a333d'}}},<!-- Step 2：配置visualMap -->visualMap:{type: 'piecewise',splitNumber:6,min:0,max:360,textStyle:{color:'white'}},<!-- Step 1:优化option配置 -->backgroundColor: '#404a59',title:{text:'全国主要城市空气质量对比图-PM2.5',left:'center',textStyle:{color:'white',fontSize:22}},legend:{orient:'vertical',left:'right',bottom:'bottom',data:['PM2.5','Top5'],textStyle:{color:'white'}},tooltip:{trigger:'item',formatter:function(params){return "城市:"+params.name+"<br>PM2.5:"+params.value[2];} }};// 使用刚指定的配置项和数据显示图表。myChart.setOption(option);<!-- Step 4: 设置series -->var series = [{name:"PM2.5",type:'scatter',coordinateSystem:'geo',symbol:'circle',symbolSize: 100,<!-- Step 1：优化series -->symbolSize: function(val){// return val[2]/10;return val[2]/8;//圆点大小},data:convertData(pmData) },<!-- Step 1：绘制带特效的散点图 -->{name:'Top5',type:'effectScatter',coordinateSystem:'geo',data:convertData(pmData.sort(function(a,b){return b.value-a.value;}).slice(0,5)),showEffectOn: 'emphasis',rippleEffect: {brushType: 'stroke'},effectType:"ripple", //特效类型，目前只支持涟漪特效'ripple'。showEffectOn:"render", //配置何时显示特效。可选：'render' 绘制完成后显示特效。'emphasis' 高亮（hover）的时候显示特效。rippleEffect:{ //涟漪特效相关配置。period:4, //动画的时间。scale:2.5, //动画中波纹的最大缩放比例。brushType:'stroke', //波纹的绘制方式，可选 'stroke' 和 'fill'。},hoverAnimation: true,label: {normal: {formatter: '{b}',position: 'right',show: true,color:'yellow'}},itemStyle: {normal: {color: '#f4e925',shadowBlur: 10,shadowColor: '#333'}},zlevel: 1,symbolSize: function(val){// return val[2]/10;return val[2]/8;//top5圆点大小},}];// 使用刚指定的配置项和数据显示图表。option.series = series;myChart.setOption(option);</script></body></html>
