第一次在项目中使用echarts画地图，在此做个小小的记录。
项目地址： github.com/licong-site…
1. 安装echarts(使用3.x, 4.x版本)
npm install [email protected] --save
如果需要在线定制适合自己项目的echarts包，可以使用
在调用echarts的组件内引入，也可以在mian.js里面全局引入 import echarts from 'echarts'
如果项目使用typescript， 需要npm install @types/echarts --save
ECharts 目前暂停地图下载，所以使用百度地图作为底图，需要安装百度地图扩展
2. 安装百度地图扩展
bmap.js 下载地址https://github.com/apache/incubator-echarts/tree/master/extension/bmap
如果安装的是echarts完整包，里面包含百度地图扩展，路径为 echarts/extension/bmap/bmap.js
在项目里引入:
import 'echarts/extension/bmap/bmap' 或者
3. 引入百度地图jssdk
使用百度地图JavaScript API，需要先注册申请秘钥： http://lbsyun.baidu.com/apiconsole/key/create
复制代码百度地图的个性地图支持用户使用JavaScript API设置地图底图的样式风格以及控制组成地图底图的元素类的显示和隐藏。可以在个性化编辑平台定制适合自己项目的地图。编辑生成的JSON就是bmap.mapStyle.styleJson的值
4. 绘制地图
下面代码里面包括echarts地图常用的带有起点和终点信息的线路图、散点图、带有涟漪特效动画的散点图。
<template>
<div ref="map" class="map">div>
template>
<script>
import echarts from 'echarts'
import 'echarts/extension/bmap/bmap'
import linesData from '../data/lines-data.json'
import mapConfig from '../data/map-config.json'
export default {
name: 'Map',
data () {
return {
chart: echarts.ECharts,
bmap: {},
linesSeries: [],
scatterSeries: [],
effectScatterSeries: [],
mapZoom: 6,
trainIcon: `path://M678.4 122.9c75.1-11.3 145.5 11.7 202.6 65.8 58 54.9 85.7 127.4 77.9 203.3-7.9 75-48.8 149-117.8 214.4-19.3 18.3-71 67.5-145.1 138.2-33.3 31.8-68.9 65.7-104.6 99.8l-34.8 33.1-13.8 13.2c-16.6 15.8-43 15.8-59.6 0L363.1 775.9l-25.4-24.2c-50.9-48.5-101.9-97-152.8-145.4C116 541 75 466.9 67.1 391.8c-7.9-76 19.9-148.3 77.9-203.3 57.1-54.1 127.6-77.1 202.6-65.8 55.8 8.5 112.3 35.4 165.4 78.5 53.2-43 109.7-70 165.4-78.3z`
}
},
mounted () {
this.initMap()
},
methods: {
initMap () { // echarts配置
this.chart = echarts.init(this.$refs.map)
this.getLineSeries()
this.getScatterSeries()
this.getEffectScatterSeries()
this.chart.setOption({
animation: false,
legend: {
orient: 'vertical',
top: 30,
left: 30,
data: linesData.map(v => v.name),
textStyle: {
color: '#222222'
},
selectedMode: 'multiple'
},
bmap: { // 加载 bmap 组件
center: [104.114129, 37.550339],
zoom: 6, // 地图当前的缩放比例
roam: true, // 开启鼠标缩放和平移漫游
// scaleLimit: { min: 6, max: 12 }, // echarts设置地图最小最大缩放比例的接口不起作用，要使用百度地图的接口设置
mapStyle: {
styleJson: mapConfig
}
},
series: [
...this.linesSeries, // 带有起点和终点信息的线数据的绘制
...this.scatterSeries, // 散点（气泡）图
...this.effectScatterSeries // 带有涟漪特效动画的散点（气泡）图
]
})
// 获取百度地图实例，使用百度地图自带的控件
this.bmap = this.chart.getModel().getComponent('bmap').getBMap()
this.bmap.setMinZoom(6) // 设置地图最小缩放比例
this.bmap.setMaxZoom(12) // 设置地图最大缩放比例
// this.bmap.addControl(new BMap.MapTypeControl({ mapTypes: [] })) // 不显示地图右上方的控件
this.bmap.addControl(new BMap.ScaleControl({ anchor: BMAP_ANCHOR_BOTTOM_LEFT })) // 在左下角显示比例尺控件
const _this = this
// 监听地图比例缩放， 可以根据缩放等级控制某些图标的显示
this.bmap.addEventListener('zoomend', function () {
_this.mapZoom = _this.bmap.getZoom()
})
},
getLineSeries () {
let series = []
linesData.forEach(line => {
series.push({
name: line.name,
type: 'lines',
coordinateSystem: 'bmap', // 使用百度地图的坐标系
silent: true, // 图形不响应和触发鼠标事件
polyline: true,
lineStyle: { color: line.primaryColor },
z: 3,
data: [
{ // 浅色底线
coords: line.stations.map(v => v.value),
lineStyle: { // 单个数据（单条线）的样式设置。
normal: {
type: 'solid',
color: line.bgColor,
width: 4,
opacity: 0.6
}
}
},
{ // 深色虚线
coords: line.stations.map(v => v.value),
lineStyle: { // 单个数据（单条线）的样式设置。
normal: {
type: 'dashed',
color: line.primaryColor,
width: 4
}
}
}
]
})
})
this.linesSeries = series
},
getScatterSeries () {
let series = []
linesData.forEach(line => {
series.push({
name: line.name,
type: 'scatter',
coordinateSystem: 'bmap',
symbol: 'circle',
symbolSize: 10,
z: 4,
label: {
normal: {
formatter: '{b}',
position: 'right',
color: '#777777',
show: true
},
emphasis: {
show: true
}
},
itemStyle: {
normal: {
color: '#FFFFFF',
borderColor: '#777777',
borderWidth: 2
}
},
data: line.stations
})
})
this.scatterSeries = series
},
getEffectScatterSeries () {
let series = []
const points = [
{
id: 1,
name: '兔子',
lineId: 1,
pre: { 'id': 8, 'name': '西宁', 'value': [101.82139605321802, 36.62634069485973] },
next: { 'id': 9, 'name': '乌鲁木齐', 'value': [87.53582115349052, 43.847009771041094] },
travlled: 0.3
},
{
id: 2,
name: '乌龟',
lineId: 1,
pre: { 'id': 5, 'name': '太原', 'value': [112.61726434350447, 37.79736828479828] },
next: { 'id': 4, 'name': '石家庄', 'value': [114.4712305290683, 38.07207484076872] },
travlled: 0.3
},
{
id: 22,
name: '火箭',
lineId: 2,
pre: { "id": 18, "name": "长沙", "value": [113.071503, 28.152942] },
next: { "id": 19, "name": "广州", "value": [113.264437, 23.154981] },
travlled: 0.3
},
{
id: 3,
name: '带鱼',
lineId: 2,
pre: { 'id': 11, 'name': '哈尔滨', 'value': [126.71808, 45.794479] },
next: { 'id': 12, 'name': '长春', 'value': [125.330802, 43.917542] },
travlled: 0.3
}
]
const getMiddlePoint = (start, end, percent) => {
const x = start[0] + (end[0] - start[0]) * percent
const y = start[1] + (end[1] - start[1]) * percent
return [x, y]
}
linesData.forEach(line => {
const pointsOnLine = points.filter(v => v.lineId === line.id)
if ( pointsOnLine && pointsOnLine.length > 0) {
const data = pointsOnLine.map(train => {
const formatter = `{p2|${train.name}}
{p3|\n当前车速：400km/h}
{p4|\n即将到达：${train.next.name}}`
return {
itemStyle: {
normal: {
color: 'red'
},
emphasis: {
color: 'red'
}
},
label: {
normal: {
formatter,
rich: {
img: {
backgroundColor: {
image: train.screenshot
}
}
}
}
},
value: getMiddlePoint(train.pre.value, train.next.value, train.travlled)
}
})
series.push({
name: line.name,
type: 'effectScatter', // 带有涟漪特效动画的散点（气泡）图
coordinateSystem: 'bmap',
symbol: this.trainIcon, // 使用自定义的SVG图标
symbolSize: [10, 10],
legendHoverLink: false,
z: 6,
effectType: 'ripple',
rippleEffect: {
period: 2, // 涟漪特效的动画周期
scale: 5, // 涟漪特效动画中波纹的最大缩放比例
brushType: 'fill' // 涟漪特效的波纹绘制方式
},
label: { // 鼠标浮动到特效点上时会显示标签
normal: {
show: false,
position: ['500%', '300%'],
distance: 20,
color: '#222222',
align: 'center',
backgroundColor: '#FFFFFF',
borderRadius: 5,
padding: 20,
shadowColor: 'rgba(0,0,0,0.16)',
shadowBlur: 6,
shadowOffsetX: 0,
shadowOffsetY: 3,
width: 200,
rich: { // 富文本标签样式
p2: {
fontSize: 16,
color: '#222222',
fontWeight: 'bolder',
lineHeight: 40
},
p3: {
fontSize: 14,
color: '#222222',
lineHeight: 18
},
p4: {
fontSize: 14,
color: '#222222',
lineHeight: 18
}
}
},
emphasis: {
show: true
}
},
data: data
})
}
})
this.effectScatterSeries = series
}
}
}
script>
<style scoped>
.map {
width: 100%;
height: 100%;
}
style>
复制代码例子比较简单直接使用的是本地的数据集lines-data.json，示例数据如下
[
{
"id": 1,
"name": "东西线",
"stations": [
{ "id": 1, "name": "北京", "value": [116.38489770446915, 39.871343476772445] },
{ "id": 2, "name": "廊坊", "value": [116.7122919288889, 39.51889293122433] },
{ "id": 3, "name": "天津", "value": [117.06714053191496, 39.06262646040431] },
{ "id": 4, "name": "石家庄站", "value": [114.4712305290683, 38.07207484076872] },
{ "id": 5, "name": "太原", "value": [112.61726434350447, 37.79736828479828] },
{ "id": 6, "name": "西安", "value": [108.94505006818304, 34.38216118776803] },
{ "id": 7, "name": "兰州", "value": [103.89904509514152, 36.03646139505536] },
{ "id": 8, "name": "西宁", "value": [101.82139605321802, 36.62634069485973] },
{ "id": 9, "name": "乌鲁木齐", "value": [87.53582115349052, 43.847009771041094] }
],
"primaryColor": "#A56743",
"bgColor": "#EDE1D9"
},
{
"id": 2,
"name": "南北线",
"stations": [
{ "id": 11, "name": "哈尔滨", "value": [126.71808, 45.794479] },
{ "id": 12, "name": "长春", "value": [125.330802, 43.917542] },
{ "id": 13, "name": "沈阳", "value": [123.442617, 41.825187] },
{ "id": 14, "name": "北京", "value": [116.38489770446915, 39.871343476772445] },
{ "id": 15, "name": "石家庄", "value": [114.4712305290683, 38.07207484076872] },
{ "id": 16, "name": "郑州", "value": [113.661999, 34.75259] },
{ "id": 17, "name": "武汉", "value": [114.430977, 30.612766] },
{ "id": 18, "name": "长沙", "value": [113.071503, 28.152942] },
{ "id": 19, "name": "广州", "value": [113.264437, 23.154981] }
],
"primaryColor": "#479CD4",
"bgColor": "#DAEBF6"
}
]
复制代码参考资料:
- github.com/apache/incu…
- lbsyun.baidu.com/index.php?t…