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写在最前
Echarts作为百度团队下一个可视化的js库，自2.0更新至3.0以来，其带来的视觉冲击更加强悍，数据可视更加精美，图形交互更加贴合用户。
由于echarts2在百度地图的实例上没有作过多的说明，echarts3更是删除了该实例，另外由于工作需要，捣鼓一番，作个笔记。
下面针对的是echarts2.2.7，其源码下载地址为：http://echarts.baidu.com/build/echarts-2.2.7.zip
百度API调用及echart库引入
1. 百度API ak申请：
http://lbsyun.baidu.com/apiconsole/key?application=key
为引入百度地图，需要申请自己的密钥，该密钥作为后面的src引入。
2. 申请认证企业信息：
http://lbsyun.baidu.com/apiconsole/auth ，配额增加申请。
当然，如果个人用户，没必要增加配额，一般不会超限制数。
3. 下载相关javaScript库：
jquery.min.js，require.js，echarts.js，这里我都已下载好，JQ用的是jQuery v1.10.2，require用的是RequireJS 2.2.0，echart用的是echarts-2.2.7，引入如下：
其中第二个 script 标签里对应的需换成申请的ak，example2.js对应为echart效果。
4. 百度地图额外依赖库main.js
这里模块化的引入对应文件夹下echarts文件，main.js存放于下载的echarts源码中的extension\BMap\src路径下，同时需引入其他echarts2的图形控件，在build\dist\chart路径，在该路径下对应有：
需要时再引入即可，若无需其他可视化扩展，可删除除map.js外的其他js文件。
5. 为实例化百度地图背景构建一个容器：
Margin设为0则与浏览器无边界融合，div属性容器id，后面js脚本里需要用到该属性，并将echart填充到该容器里，当然，div可以有多个，故可以填充多个echart实例。实例化后再js脚本里调用echart api即可：
上图中的方法都封装在main.js中，使用的时候按上图调用即可，其中css样式对应之前的容器大小，BMapExt为初始化的地图对象，具体可看main.js源码，中间getMap,getEchartsContainer为获取地图实例及echart实例对象，BMap.Point是定义当前打开地图的中心点，最下面两个函数则定义了地图的缩放等级及是否可以滚动缩放。
6. 引入的文档结构：
7. 测试代码–首页
<html>
<head>
<meta charset="utf-8">
<style type="text/css">
body {
margin: 0;
}
#main {
height: 100%;
}
</style>
</head>
<body>
<div id="main"></div>
<script src="./echarts/echarts.js"></script>
<script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=53oVIOgmSIejwV7EfphPgTynOZbIiVYu"></script>
<script src="./js/jquery.min.js"></script>
<script src="./js/require.js"></script>
<script src="./js/example2.js"></script>
</body>
</html>8. 测试代码–echarts+百度地图样式：
(function () {
require.config({
paths: { echarts: "echarts", },
});
require(
[
"echarts",
"echarts/chart/main",
"echarts/chart/map"
],
function (echarts, BMapExtension) {
$('#main').css({ height:$('body').height(), width: $('body').width() });
// 初始化地图
var BMapExt = new BMapExtension($('#main')[0], BMap, echarts,{ enableMapClick: false });
var map = BMapExt.getMap();
var container = BMapExt.getEchartsContainer();
var startPoint = { x: 113.328755, //天河城 y: 23.137588 };
var point = new BMap.Point(startPoint.x, startPoint.y);
map.centerAndZoom(point, 17);
map.enableScrollWheelZoom(true);
// 地图自定义样式
map.setMapStyle({ styleJson: [ { 'featureType': 'land', //调整土地颜色 'elementType': 'geometry', 'stylers': { 'color': '#081734' } }, { 'featureType': 'building', //调整建筑物颜色 'elementType': 'geometry', 'stylers': { 'color': '#04406F' } }, { 'featureType': 'building', //调整建筑物标签是否可视 'elementType': 'labels', 'stylers': { 'visibility': 'off' } }, { 'featureType': 'highway', //调整高速道路颜色 'elementType': 'geometry', 'stylers': { 'color': '#015B99' } }, { 'featureType': 'highway', //调整高速名字是否可视 'elementType': 'labels', 'stylers': { 'visibility': 'off' } }, { 'featureType': 'arterial', //调整一些干道颜色 'elementType': 'geometry', 'stylers': { 'color':'#003051' } }, { 'featureType': 'arterial', 'elementType': 'labels', 'stylers': { 'visibility': 'off' } }, { 'featureType': 'green', 'elementType': 'geometry', 'stylers': { 'visibility': 'off' } }, { 'featureType': 'water', 'elementType': 'geometry', 'stylers': { 'color': '#044161' } }, { 'featureType': 'subway', //调整地铁颜色 'elementType': 'geometry.stroke', 'stylers': { 'color': '#003051' } }, { 'featureType': 'subway', 'elementType': 'labels', 'stylers': { 'visibility': 'off' } }, { 'featureType': 'railway', 'elementType': 'geometry', 'stylers': { 'visibility': 'off' } }, { 'featureType': 'railway', 'elementType': 'labels', 'stylers': { 'visibility': 'off' } }, { 'featureType': 'all', //调整所有的标签的边缘颜色 'elementType': 'labels.text.stroke', 'stylers': { 'color': '#313131' } }, { 'featureType': 'all', //调整所有标签的填充颜色 'elementType': 'labels.text.fill', 'stylers': { 'color': '#FFFFFF' } }, { 'featureType': 'manmade', 'elementType': 'geometry', 'stylers': { 'visibility': 'off' } }, { 'featureType': 'manmade', 'elementType': 'labels', 'stylers': { 'visibility': 'off' } }, { 'featureType': 'local', 'elementType': 'geometry', 'stylers': { 'visibility': 'off' } }, { 'featureType': 'local', 'elementType': 'labels', 'stylers': { 'visibility': 'off' } }, { 'featureType': 'subway', 'elementType': 'geometry', 'stylers': { 'lightness': -65 } }, { 'featureType': 'railway', 'elementType': 'all', 'stylers': { 'lightness': -40 } }, { 'featureType': 'boundary', 'elementType': 'geometry', 'stylers': { 'color': '#8b8787', 'weight': '1', 'lightness': -29 } } ] });
option = { color: ['gold','aqua','lime','red','blue'], title : { text: '摇折扣--通勤图', subtext: '', x:'center', textStyle: { color: '#fff', fontSize: 25 } }, legend: { orient: 'vertical', x:'left', data:['全部', '上班人群', '购物人群','买菜人群','流浪人群'], selectedMode: 'single', selected:{ '上班人群' : false, '购物人群' : false, '买菜人群' : false, '流浪人群' : false, }, textStyle : { color: '#fff', fontSize: 15 }, padding:[20,5,5,20] }, tooltip : { show: false, trigger: 'item', formatter: function (v) { if(v[2].tooltipValue!=null){ return v[2].tooltipValue; }else{ return v[1]; } }}, toolbox: { show : false, orient : 'vertical', x: 'right', y: 'center', feature : { mark : {show: true}, dataView : {show: true, readOnly: false}, restore : {show: true}, saveAsImage : {show: true} } }, series : [ { type:'map', mapType: 'none', data:[], markLine : { Symbol:['none', 'arrow'], symbolSize:['0', '0.1'], smooth:true, smooth:10, effect : { show: true, scaleSize: 1, period: 30, color: '#fff', shadowBlur: 10 }, itemStyle : { color: 'red', normal: { color:function(param){ return(param.data[0].value.colorValue); }, borderWidth:1, lineStyle: { type: 'dashed', width: 1.5, shadowBlur: 10 }, label:{show:false} } }, data : [[{name:'p401'}, {name:'p900',value:{colorValue:'grey'}}], [{name:'p402'}, {name:'p900',value:{colorValue:'grey'}}], [{name:'p403'}, {name:'p900',value:{colorValue:'grey'}}], [{name:'p404'}, {name:'p900',value:{colorValue:'grey'}}], [{name:'p405'}, {name:'p900',value:{colorValue:'grey'}}], [{name:'p406'}, {name:'p900',value:{colorValue:'grey'}}], [{name:'p407'}, {name:'p900',value:{colorValue:'grey'}}], [{name:'p408'}, {name:'p900',value:{colorValue:'grey'}}], [{name:'p409'}, {name:'p900',value:{colorValue:'grey'}}], [{name:'p410'}, {name:'p900',value:{colorValue:'grey'}}], [{name:'p411'}, {name:'p900',value:{colorValue:'grey'}}], [{name:'p412'}, {name:'p900',value:{colorValue:'grey'}}], [{name:'p413'}, {name:'p900',value:{colorValue:'grey'}}], [{name:'p414'}, {name:'p900',value:{colorValue:'grey'}}], 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var myChart = BMapExt.initECharts(container);
window.onresize = myChart.onresize;
BMapExt.setOption(option);
}
);
})();