echarts 使用案例：针对map地图中显示数据格式化

前言：

1，报表连接：http://gallery.echartsjs.com/editor.html?c=xrJZ60TVIg

2，echats 制作报表中，使用地图的展示样式，发现地图上的显示数据不符合本意，地图中默认显示：区域：经纬度，数值。

1，先看下截图：

如图中成都省显示就会出现：成都省，123.12,45.22,100；

如果你这不是你所需要的需要自定义显示的样式，可以参考下面的解决方法；

代码我直接从网站复制；

var geoCoordMap = {"北京": [116.46, 39.92],"南京": [118.78, 32.04],"吉林": [126.57, 43.87],"上海": [121.48, 31.22],"成都": [104.06, 30.67],"哈尔滨": [126.63, 45.75],"沈阳": [123.38, 41.8],// "合肥":[117.27,31.86],"武汉": [114.31, 30.52],"石家庄": [114.48, 38.03],"天津": [117.2, 39.13],"太原": [112.53, 37.87],"西安": [108.95, 34.27],"南宁": [108.33, 22.84],"南昌": [115.89, 28.68],"济南": [117, 36.65],
};var data = [{name: "北京",value: 38
}, {name: "南京",value: 147
}, {name: "吉林",value: 74
}, {name: "上海",value: 33
}, {name: "成都",value: 192
}, {name: "哈尔滨",value: 35
}, {name: "沈阳",value: 0
}, {name: "武汉",value: 36
}, {name: "石家庄",value: 32
}, {name: "天津",value: 7
}, {name: "太原",value: 1
}, {name: "西安",value: 63
}, {name: "南宁",value: 29
}, {name: "南昌",value: 48
}, {name: "济南",value: 61
}];
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;
};var convertedData = [convertData(data),convertData(data.sort(function(a, b) {return b.value - a.value;}).slice(0, 6))
];
data.sort(function(a,b){return    a.value-b.value;
})var selectedItems = [];var categoryData = [];var barData = [];//   var maxBar = 30;var sum = 0;var count = data.length;for(var i=0;i<data.length;i++){categoryData.push(data[i].name);barData.push(data[i].value);sum+=data[i].value;}
console.log(categoryData);
console.log(sum+"   "+count)
option = {backgroundColor: '#404a59',animation: true,animationDuration: 1000,animationEasing: 'cubicInOut',animationDurationUpdate: 1000,animationEasingUpdate: 'cubicInOut',title: [{text: '全国主要城市 业务量',subtext: '内部数据请勿外传',left: 'center',textStyle: {color: '#fff'}}, {id: 'statistic',text: count ? '平均: ' +parseInt((sum / count).toFixed(4)) : '',right: 120,top: 40,width: 100,textStyle: {color: '#fff',fontSize: 16}}],toolbox: {iconStyle: {normal: {borderColor: '#fff'},emphasis: {borderColor: '#b1e4ff'}},feature: {dataZoom: {},brush: {type: ['rect', 'polygon', 'clear']},saveAsImage: {show: true}}},brush: {outOfBrush: {color: '#abc'},brushStyle: {borderWidth: 2,color: 'rgba(0,0,0,0.2)',borderColor: 'rgba(0,0,0,0.5)',},seriesIndex: [0, 1],throttleType: 'debounce',throttleDelay: 300,geoIndex: 0},geo: {map: 'china',left: '10',right: '35%',center: [117.98561551896913, 31.205000490896193],zoom: 1.5,label: {emphasis: {show: false}},roam: true,itemStyle: {normal: {areaColor: '#323c48',borderColor: '#111'},emphasis: {areaColor: '#2a333d'}}}, tooltip: {trigger: 'item'

 },grid: {right: 40,top: 100,bottom: 40,width: '30%'},xAxis: {type: 'value',scale: true,position: 'top',boundaryGap: false,splitLine: {show: false},axisLine: {show: false},axisTick: {show: false},axisLabel: {margin: 2,textStyle: {color: '#aaa'}},},yAxis: {type: 'category',//  name: 'TOP 20',nameGap: 16,axisLine: {show: true,lineStyle: {color: '#ddd'}},axisTick: {show: false,lineStyle: {color: '#ddd'}},axisLabel: {interval: 0,textStyle: {color: '#ddd'}},data: categoryData},series: [{// name: 'pm2.5',type: 'scatter',coordinateSystem: 'geo',data: convertedData[0],symbolSize: function(val) {return Math.max(val[2] / 10, 8);},label: {normal: {formatter: '{b}',position: 'right',show: false},emphasis: {show: true}},itemStyle: {normal: {color: '#ddb926',position: 'right',show: true}}}, {//  name: 'Top 5',type: 'effectScatter',coordinateSystem: 'geo',data: convertedData[0],symbolSize: function(val) {return Math.max(val[2] / 10, 8);},showEffectOn: 'emphasis',rippleEffect: {brushType: 'stroke'},hoverAnimation: true,label: {normal: {formatter: '{b}',position: 'right',show: true}},itemStyle: {normal: {color: '#f4e925',shadowBlur: 10,shadowColor: '#333'}},zlevel: 1}, {id: 'bar',zlevel: 2,type: 'bar',symbol: 'none',itemStyle: {normal: {color: '#ddb926'}},data: data}]
};//  var myChart= echarts.init(document.getElementById('map'));
//  myChart.setOption(option);
//myChart.on('brushselected', renderBrushed);/*
setTimeout(function () {myChart.dispatchAction({type: 'brush',areas: [{geoIndex: 0,brushType: 'polygon',coordRange: [[119.72,34.85],[119.68,34.85],[119.5,34.84],[119.19,34.77],[118.76,34.63],[118.6,34.6],[118.46,34.6],[118.33,34.57],[118.05,34.56],[117.6,34.56],[117.41,34.56],[117.25,34.56],[117.11,34.56],[117.02,34.56],[117,34.56],[116.94,34.56],[116.94,34.55],[116.9,34.5],[116.88,34.44],[116.88,34.37],[116.88,34.33],[116.88,34.24],[116.92,34.15],[116.98,34.09],[117.05,34.06],[117.19,33.96],[117.29,33.9],[117.43,33.8],[117.49,33.75],[117.54,33.68],[117.6,33.65],[117.62,33.61],[117.64,33.59],[117.68,33.58],[117.7,33.52],[117.74,33.5],[117.74,33.46],[117.8,33.44],[117.82,33.41],[117.86,33.37],[117.9,33.3],[117.9,33.28],[117.9,33.27],[118.09,32.97],[118.21,32.7],[118.29,32.56],[118.31,32.5],[118.35,32.46],[118.35,32.42],[118.35,32.36],[118.35,32.34],[118.37,32.24],[118.37,32.14],[118.37,32.09],[118.44,32.05],[118.46,32.01],[118.54,31.98],[118.6,31.93],[118.68,31.86],[118.72,31.8],[118.74,31.78],[118.76,31.74],[118.78,31.7],[118.82,31.64],[118.82,31.62],[118.86,31.58],[118.86,31.55],[118.88,31.54],[118.88,31.52],[118.9,31.51],[118.91,31.48],[118.93,31.43],[118.95,31.4],[118.97,31.39],[118.97,31.37],[118.97,31.34],[118.97,31.27],[118.97,31.21],[118.97,31.17],[118.97,31.12],[118.97,31.02],[118.97,30.93],[118.97,30.87],[118.97,30.85],[118.95,30.8],[118.95,30.77],[118.95,30.76],[118.93,30.7],[118.91,30.63],[118.91,30.61],[118.91,30.6],[118.9,30.6],[118.88,30.54],[118.88,30.51],[118.86,30.51],[118.86,30.46],[118.72,30.18],[118.68,30.1],[118.66,30.07],[118.62,29.91],[118.56,29.73],[118.52,29.63],[118.48,29.51],[118.44,29.42],[118.44,29.32],[118.43,29.19],[118.43,29.14],[118.43,29.08],[118.44,29.05],[118.46,29.05],[118.6,28.95],[118.64,28.94],[119.07,28.51],[119.25,28.41],[119.36,28.28],[119.46,28.19],[119.54,28.13],[119.66,28.03],[119.78,28],[119.87,27.94],[120.03,27.86],[120.17,27.79],[120.23,27.76],[120.3,27.72],[120.42,27.66],[120.52,27.64],[120.58,27.63],[120.64,27.63],[120.77,27.63],[120.89,27.61],[120.97,27.6],[121.07,27.59],[121.15,27.59],[121.28,27.59],[121.38,27.61],[121.56,27.73],[121.73,27.89],[122.03,28.2],[122.3,28.5],[122.46,28.72],[122.5,28.77],[122.54,28.82],[122.56,28.82],[122.58,28.85],[122.6,28.86],[122.61,28.91],[122.71,29.02],[122.73,29.08],[122.93,29.44],[122.99,29.54],[123.03,29.66],[123.05,29.73],[123.16,29.92],[123.24,30.02],[123.28,30.13],[123.32,30.29],[123.36,30.36],[123.36,30.55],[123.36,30.74],[123.36,31.05],[123.36,31.14],[123.36,31.26],[123.38,31.42],[123.46,31.74],[123.48,31.83],[123.48,31.95],[123.46,32.09],[123.34,32.25],[123.22,32.39],[123.12,32.46],[123.07,32.48],[123.05,32.49],[122.97,32.53],[122.91,32.59],[122.83,32.81],[122.77,32.87],[122.71,32.9],[122.56,32.97],[122.38,33.05],[122.3,33.12],[122.26,33.15],[122.22,33.21],[122.22,33.3],[122.22,33.39],[122.18,33.44],[122.07,33.56],[121.99,33.69],[121.89,33.78],[121.69,34.02],[121.66,34.05],[121.64,34.08]]}]});
}, 0);
*/function renderBrushed(params) {var mainSeries = params.batch[0].selected[0];var selectedItems = [];var categoryData = [];var barData = [];var maxBar = 30;var sum = 0;var count = 0;for (var i = 0; i < mainSeries.dataIndex.length; i++) {var rawIndex = mainSeries.dataIndex[i];var dataItem = convertedData[0][rawIndex];var pmValue = dataItem.value[2];sum += pmValue;count++;selectedItems.push(dataItem);}selectedItems.sort(function (a, b) {//   return b.value[2] - a.value[2];return a.value-b.value;});for (var i = 0; i < Math.min(selectedItems.length, maxBar); i++) {categoryData.push(selectedItems[i].name);barData.push(selectedItems[i].value[2]);}this.setOption({yAxis: {data: categoryData},xAxis: {axisLabel: {show: !!count}},title: {id: 'statistic',text: count ? '平均: ' + (sum / count).toFixed(4) : ''},series: {id: 'bar',//        sort:'descending',data: barData}});
}

代码片段中标注为红色的部位是需要增加格式化函数的，这块代码我拿出来单独解释。

tooltip: {trigger: 'item'

},

在tooltip 属性中增加一个属性[formatter];

最终结果：

tooltip:{

trigger:'item',

formatter:function(params){

//这里可以获取到你的数据params

//处理数据，返回显示结果。

return '23';

}

情况一：

如果存在地图上数据显示正常但是右边柱状图显示有问题，需要特别注意componentSubType 这个参数，

可以在控制台输出params 可以看到componentSubType 这个属性，使用它来区分数据在地图与柱状图上的显示。

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