使用echarts的bmap配置项绘制区域轮廓遮罩

示例图

代码

<template><div id="map" style="width: 100%; height: 100vh"></div>
</template><script>
import * as echarts from "echarts";
import "echarts/extension/bmap/bmap";
export default {data() {return {mapOptions: {bmap: {roam: true, // 是否开启拖拽和缩放center: [116.403414, 39.924091], // 地图中心点坐标zoom: 15, // 缩放级别},series: [{type: "scatter",coordinateSystem: "bmap",symbolSize: 20,},],},};},mounted() {this.init();},methods: {init() {// 初始化百度地图var myChart = echarts.init(document.getElementById("map"));myChart.setOption(this.mapOptions);var map = myChart.getModel().getComponent("bmap").getBMap();map.setMinZoom(9);map.setMaxZoom(22);var boundary = new BMap.Boundary();boundary.get("北京市", (rs) => {let count = rs.boundaries.length;if (count === 0) {alert("未能获取当前行政区域");return;}const EN_JW = "180, 90;";const NW_JW = "-180,  90;";const WS_JW = "-180, -90;";const SE_JW = "180, -90;";var points = rs.boundaries[0];// 东南西北四个角添加一个覆盖物const ply1 = new BMap.Polygon(points + SE_JW + SE_JW + WS_JW + NW_JW + EN_JW + SE_JW,{strokeColor: "none",fillColor: "#fff",fillOpacity: 0.9,strokeOpacity: 1,});map.addOverlay(ply1);// 绘制北京市整体的外轮廓for (let i = 0; i < count; i++) {const ply = new BMap.Polygon(points, {strokeWeight: 2,strokeColor: "#2457ff",fillColor: "transparent",});map.addOverlay(ply);}});},},
};
</script><style></style>

参考文章
百度地图api只显示某个省市的行政区域
Echarts中使用bmap作为底图，添加行政划区遮罩层