openlayers6【二十三】vue LineString 实现地图轨迹路线，设置起点和终点的标注信息详解

1.写在前面

本文主要是下面一个简单切经典的需求场景，在地图上根据轨迹的经纬度数据，通过openlayers的LineString 方法创建一条线，并且设置起点和终点的标注信息。下面是效果图。

2. 创建轨迹线段，设置起点和终点位置和样式代码

addTrack() {// 根据经纬度点位创建线var routeFeature = new Feature({type: "route",geometry: new LineString(trackCar).transform("EPSG:4326", "EPSG:3857"),});// 创建开始图标const startMarker = new Feature({type: "startMarker",geometry: new Point(trackCar[0]).transform("EPSG:4326", "EPSG:3857"),});// 创建结束图标const endMarker = new Feature({type: "endMarker",geometry: new Point(trackCar[trackCar.length - 1]).transform("EPSG:4326","EPSG:3857"),});// 设置样式var styles = {// 如果类型是 route 的样式route: new Style({stroke: new Stroke({width: 2, //线的宽度color: "#ffc641", //线的颜色}),}),// 如果类型是 geoMarker 的样式startMarker: new Style({image: new Icon({src: require("../../assets/images/start.png"),anchor: [0.5, 1.1], // 设置偏移}),}),endMarker: new Style({image: new Icon({src: require("../../assets/images/end.png"),anchor: [0.5, 1.1], // 设置偏移}),}),};// 把小车和线添加到图层this.vectorLayer = new VectorLayer({source: new VectorSource({features: [routeFeature, startMarker, endMarker],}), //线,起点的图标,终点的图标style: function (feature) {return styles[feature.get("type")];},});
},

3. 完整代码

<template><div id="content"><div id="map" ref="map" /></div>
</template><script>
import "ol/ol.css";
import { Map, Feature } from "ol";
import TileLayer from "ol/layer/Tile";
import VectorLayer from "ol/layer/Vector";
import VectorSource from "ol/source/Vector";
import { Style, Stroke, Icon } from "ol/style";
import { LineString, Point, Polygon } from "ol/geom";
import XYZ from "ol/source/XYZ";
// 一段经纬度数据
import trackCar from "./track-car.json";
export default {data() {return {map: null,vectorLayer: null,};},mounted() {this.addTrack(); //创建this.initMap(); //初始化地图},methods: {addTrack() {// 根据经纬度点位创建线var routeFeature = new Feature({type: "route",geometry: new LineString(trackCar).transform("EPSG:4326", "EPSG:3857"),});// 创建开始图标const startMarker = new Feature({type: "startMarker",geometry: new Point(trackCar[0]).transform("EPSG:4326", "EPSG:3857"),});// 创建结束图标const endMarker = new Feature({type: "endMarker",geometry: new Point(trackCar[trackCar.length - 1]).transform("EPSG:4326","EPSG:3857"),});// 设置样式var styles = {// 如果类型是 route 的样式route: new Style({stroke: new Stroke({width: 2, //线的宽度color: "#ffc641", //线的颜色}),}),// 如果类型是 geoMarker 的样式startMarker: new Style({image: new Icon({src: require("../../assets/images/start.png"),anchor: [0.5, 1.1], // 设置偏移}),}),endMarker: new Style({image: new Icon({src: require("../../assets/images/end.png"),anchor: [0.5, 1.1], // 设置偏移}),}),};// 把小车和线添加到图层this.vectorLayer = new VectorLayer({source: new VectorSource({features: [routeFeature, startMarker, endMarker],}), //线,起点的图标,终点的图标style: function (feature) {return styles[feature.get("type")];},});},/*** 初始化一个 openlayers 地图*/initMap() {const target = "map"; // 跟页面元素的 id 绑定来进行渲染const tileLayer = [new TileLayer({source: new XYZ({url: "http://map.geoq.cn/ArcGIS/rest/services/ChinaOnlineStreetPurplishBlue/MapServer/tile/{z}/{y}/{x}",}),projection: "EPSG:3857",}),this.vectorLayer, //把线,起点,终点的图标加载到图层];this.map = new Map({target: target, // 绑定dom元素进行渲染layers: tileLayer, // 配置地图数据源});this.map.getView().fit(new Polygon([trackCar]).transform("EPSG:4326", "EPSG:3857"), {padding: [100, 100, 100, 100],}); //设置地图的缩放距离离屏幕的大小},},
};
</script>
<style lang="scss" scoped>
// 此处非核心内容，已删除
</style>

4. track-car.json 轨迹JSON数据

这是我的模拟数据，实际数据根据你们业务需求返回的数据进行获取渲染。

import trackCar from "./track-car.json";

[[120.97202539443971,29.149083495140076],[120.97365617752077,29.147656559944153],[120.97478270530702,29.146594405174255],[120.97543716430665,29.14593994617462],[120.97596287727357,29.145285487174988],[120.9764349460602,29.144577383995056],[120.97669243812561,29.14408653974533],[120.97699284553528,29.143426716327667],[120.97723960876465,29.142654240131378],[120.97735226154329,29.142230451107025],[120.97756683826448,29.141243398189545],[120.97781896591188,29.140020310878754],[120.97790479660036,29.139483869075775],[120.97804427146912,29.138880372047424],[120.97839832305908,29.137893319129944],[120.97876310348511,29.137163758277893],[120.97941756248474,29.13626253604889],[120.9810483455658,29.134342074394226],[120.9818959236145,29.133376479148865],[120.98270595073701,29.132418930530548],[120.98334968090059,29.131678640842438],[120.98402559757234,29.130959808826447],[120.98470687866212,29.13033217191696],[120.985227227211,29.12989765405655],[120.9860908985138,29.129264652729034],[120.98707258701324,29.12864774465561],[120.9880542755127,29.12812203168869],[120.98936319351196,29.127537310123444],[120.99144458770752,29.126807749271393],[120.99297881126404,29.126287400722504],[120.99447548389435,29.125772416591644],[120.99569857120514,29.125321805477142],[120.99704504013062,29.124737083911896],[120.99830567836761,29.12410408258438],[120.99883675575256,29.123830497264862],[120.99963068962097,29.1233691573143],[121.00059628486633,29.122741520404816],[121.00166380405426,29.122038781642914],[121.00329995155334,29.120981991291046],[121.00475907325745,29.120016396045685],[121.00560128688812,29.119447767734528],[121.00612163543701,29.11910980939865],[121.0070389509201,29.11860018968582],[121.00769877433777,29.118267595767975],[121.00861608982086,29.1178759932518],[121.00979626178741,29.117489755153656],[121.01091742515564,29.117216169834137],[121.01166307926178,29.117071330547336],[121.01268768310547,29.116931855678562],[121.0139536857605,29.116878211498264],[121.01507484912872,29.116931855678562],[121.01689338684082,29.117071330547336],[121.01934492588043,29.117291271686558],[121.02029979228975,29.117350280284885],[121.02101325988771,29.117339551448826],[121.02191984653474,29.117242991924286],[121.02294981479646,29.117001593112946],[121.02402269840242,29.116583168506622],[121.02478981018068,29.1161647439003],[121.0260719060898,29.115327894687653]
]