echarts合并地图，把中国各个省份分成华北,东北,华东,华中,华南,西南,西北七个大区
最近公司有个需求是按照大区，即把中国分成华北','东北','华东','华中','华南','西南','西北'七个大区，
但是echarts地图只有省市，还没有大区，只能自己网上找资料再按需求写了
echarts地图合并关键点是把coordinates和encodeOffsets合并，而且这两个必须都合并，且最多只能合并到二维数组，合并到三维数组就不行了。
实例结果截图
代码：
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta http-equiv="X-UA-Compatible" content="ie=edge" />
<title>echarts地图合并-生成中国大区</title>
</head>
<body>
<div class="echarts-map">
<div class="echarts-map-box" id="echartsMapBox" style="width: 1000px;height: 400px;"></div>
<script type="text/javascript" src="js/jquery-1.12.4.min.js"></script>
<script type="text/javascript" src="js/echarts.min.js"></script>
<script type="text/javascript" src="js/china.js"></script>
<script type="text/javascript">
$(document).ready(function(){
repRegionStrategy();
})
var mergeProvinces = function(chinaJson, names, properties) {//合并大区里省份的coordinates
var features = chinaJson.features;
var polygons = [];
var polygons2 = [];
for(var i = 0; i < names.length; i++) {
var polygonsCoordinates = [];
var polygonsEncodeOffsets = [];
for(var z = 0; z < names[i].length;z++){
for(var j = 0; j < features.length; j++) {
if(features[j].properties.name == names[i][z]) {
if(features[j].geometry.coordinates[0].constructor == String){//合并coordinates
for(var l = 0; l<features[j].geometry.coordinates.length;l++){
polygonsCoordinates.push(features[j].geometry.coordinates[l]);
}
}else if(features[j].geometry.coordinates[0].constructor == Array){
for(var k=0;k<features[j].geometry.coordinates.length;k++){
for(var d=0;d<features[j].geometry.coordinates[k].length;d++){
polygonsCoordinates.push(features[j].geometry.coordinates[k][d]);
}
}
}
if(features[j].geometry.encodeOffsets[0].constructor == String){//合并encodeOffsets
polygonsEncodeOffsets.push(features[j].geometry.encodeOffsets);
}else if(features[j].geometry.encodeOffsets[0].constructor == Array){
for(var k=0;k<features[j].geometry.encodeOffsets.length;k++){
if(features[j].geometry.encodeOffsets[k][0].constructor == Array){
for(var e=0;e<features[j].geometry.encodeOffsets[k].length;e++){
polygonsEncodeOffsets.push(features[j].geometry.encodeOffsets[k][e]);
}
}else{
polygonsEncodeOffsets.push(features[j].geometry.encodeOffsets[k]);
}
}
}
break;
}
}
}
polygons.push(polygonsCoordinates);
polygons2.push(polygonsEncodeOffsets);
}
// 构建新的合并区域
var features = [];
for(var a = 0;a<names.length;a++){
var feature = {
id: features.length.toString(),
type: "FeatureCollection",
geometry: {
type: "Polygon",
coordinates: polygons[a],
encodeOffsets: polygons2[a]
},
properties: {
name: properties.name[a] || "",
childNum:polygons[a].length
}
};
if(properties.cp[a]) {
feature.properties.cp = properties.cp[a];
}
// 将新的合并区域添加到地图中
features.push(feature);
}
chinaJson.features = features;
};
function repRegionStrategy(){debugger;
$.get('js/china.json', function (chinaJson) {
var params = {
names: [//把各个大区的省份用二维数组分开
['北京','天津','河北','山西','内蒙古'],
["黑龙江","吉林","辽宁"],
['山东','江苏','安徽','江西','浙江','福建','上海','台湾'],
['河南','湖北','湖南'],
['广东','广西','海南','香港','澳门'],
['重庆','四川','云南','西藏','贵州'],
['陕西','甘肃','青海','宁夏','新疆']
],
properties: {//自定义大区的名字，要和上面的大区省份一一对应
name: ['华北','东北','华东','华中','华南','西南','西北'],
cp: [//经纬度可以自己随意定义
[116.24,39.54],
[126.32,43.50],
[121.28,31.13],
[114.20,30.32],
[113.15,23.08],
[104.04,30.39],
[103.49,36.03]
]
}
};
mergeProvinces(chinaJson, params.names, params.properties);
echarts.registerMap('china', chinaJson); // 注册地图
var pRChart = echarts.init(document.getElementById('echartsMapBox'));
var data = [//地图数据
{
"name": "东北",
"value": 3685
},
{
"name": "华北",
"value": 7342
},
{
"name": "华南",
"value": 21416
},
{
"name": "华东",
"value": 25314
},
{
"name": "华中",
"value": 2500
},
{
"name": "西南",
"value": 10427
},
{
"name": "西北",
"value": 2440
}
];
option = {
backgroundColor: '#fff',//地图背景色
title : {
text: '营销策略',
left: 'center',
top: 'top',
textStyle: {
color: '#333'
}
},
grid: { //echarts地图距离容器位置
left:20,
top:20,
containLabel: false,
},
tooltip: {//鼠标放上去提示
trigger: 'item'
},
//左侧小导航图标
visualMap: {
show : true,
type: 'continuous', // 定义为连续型 viusalMap
min:10, //指定 visualMapContinuous 组件的允许的最小值
max:100000,
minOpen:true, //界面上会额外多出一个『< min』的选块
maxOpen:true,
realtime:true,
itemWidth:20,
align:"auto",
left:"50px", //组件离容器左侧的距离,'left', 'center', 'right','20%'
top:"auto",
orient:"vertical",
hoverLink:true,
inverse:false,
text:['高', '低'],
inRange:{ //定义 在选中范围中 的视觉元素
color: ['#f6efa6', '#ffb61e', '#ee9a00'],
symbolSize: [30, 100]
},
outOfRange:{ //定义 在选中范围外 的视觉元素。
color: ['#666', '#333', '#000'],
symbolSize: [30, 100]
}
},
series: [
{
name: '大区',//城市
type: 'map',
map: 'china',
geoIndex: 1,
aspectScale: 0.75, //长宽比
symbolSize: 20,
data: data,
showLegendSymbol: true, // 存在legend时显示
label: {
normal: {
show: true,
textStyle: {
color: '#333'
}
},
emphasis: {//鼠标放上去时的状态
show: true,
textStyle: {
color: '#333'
}
}
},
roam: true,//禁止拖拽和伸缩
itemStyle: {
normal: {
areaColor: '#f6efa6',
borderColor: '#a5a279',
borderWidth: 1
},
emphasis: {
areaColor: '#ffdf33'
}
}
}
]
};
pRChart.setOption(option,true);
});
}
</script>
</div>
</body>
</html>
