Vue+Openlayers实现地图上绘制线 |
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Vue+Openlayers实现地图上绘制线
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场景
Vue+Openlayers实现显示图片并分优先级多图层加载： https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/121235987 上面是添加多个点的图层，如果添加线的图层，形如下面的效果
注： 博客： https://blog.csdn.net/badao_liumang_qizhi 关注公众号 霸道的程序猿 获取编程相关电子书、教程推送与免费下载。 实现1、导入新的模块 //导入基本模块 import "ol/ol.css"; import Map from "ol/Map"; import View from "ol/View"; import { Point,LineString } from "ol/geom"; import Feature from "ol/Feature"; import { Icon,Style,Stroke} from "ol/style"; //导入相关模块 import { Tile as TileLayer , Vector as VectorLayer } from 'ol/layer' import { TileWMS ,Vector as VectorSource } from 'ol/source'2、声明一个线的图层和数据源 data() { return { map: null, // map地图 layer:null, //地图图层 lightLayer:null, //灯图层 houseLayer:null, //房子图层 lineLayer:null, //线图层 lineSource:null, //线数据源3、添加要绘制的线的坐标数组 注意这里必须是数组嵌套数组的格式 //线的数据 lineData:[ [986434.4063822062, 215782.0959711917], [989701.5290279881,217149.84072807242], [990613.3107184113,215946.4192185118], ],这里是三个坐标点，会将这三个点依次连接起来 4、线的图层进行赋值 //线的图层 this.lineSource = new VectorSource({ wrapX: false }); this.lineLayer = new VectorLayer({ source: this.lineSource, });5、map中加入线的图层 this.map = new Map({ //地图容器ID target: "map", //引入地图 layers: [this.layer,this.lightLayer,this.houseLayer,this.lineLayer], view: new View({ //地图中心点 center: [987777.93778, 213834.81024], zoom: 12, minZoom:6, // 地图缩放最小级别 maxZoom:19, }), });6、页面加载完调用初始化地图的方法，方法中调用画线的方法 //画线 drawLine(){ let pointData = this.lineData; // 所有点位信息 //下边来添加一线feature var feature = new Feature({ type: "lineStyle", geometry: new LineString( pointData // 线的坐标 ), }); let color = 'green'; let lineStyle = new Style({ stroke: new Stroke({ color: color, width: 4, }), }); // 添加线的样式 feature.setStyle(lineStyle); // 添加线的fature this.lineSource.addFeature(feature); },7、完整示例代码 //导入基本模块 import "ol/ol.css"; import Map from "ol/Map"; import View from "ol/View"; import { Point,LineString } from "ol/geom"; import Feature from "ol/Feature"; import { Icon,Style,Stroke} from "ol/style"; //导入相关模块 import { Tile as TileLayer , Vector as VectorLayer } from 'ol/layer' import { TileWMS ,Vector as VectorSource } from 'ol/source' export default { name: "olMapImageWMSMulLayers", data() { return { map: null, // map地图 layer:null, //地图图层 lightLayer:null, //灯图层 houseLayer:null, //房子图层 lineLayer:null, //线图层 lineSource:null, //线数据源 //红绿灯数据 lightData:[ {x:"987798.93778", y:"213885.81024"}, {x:"987710.93778", y:"213810.81024"}, ], //房子数据 houseData:[ {x:"986610.93778", y:"213885.81024"}, {x:"986510.93778", y:"213810.81024"}, ], //线的数据 lineData:[ [986434.4063822062, 215782.0959711917], [989701.5290279881,217149.84072807242], [990613.3107184113,215946.4192185118], ], }; }, mounted() { this.initMap(); setInterval(() => { this.initLightData(); }, 1000) }, methods: { //初始化红绿灯数据 initLightData(){ this.lightLayer.getSource().clear(); this.lightData.forEach((item, index) => { var feature = new Feature({ geometry: new Point([Number(item.x), Number(item.y)]), }); let url = "images/light.png"; const zoom = this.map.getView().getZoom(); let style = new Style({ image: new Icon({ scale: 0.15 * (zoom -13) , src: url, anchor: [0.48, 0.52], }), }); feature.setStyle(style); this.lightLayer.getSource().addFeature(feature); }); }, //初始化房子数据 initHouseData(){ this.houseLayer.getSource().clear(); this.houseData.forEach((item, index) => { var feature = new Feature({ geometry: new Point([Number(item.x), Number(item.y)]), }); let url = "images/house.png"; let style = new Style({ image: new Icon({ scale: 0.3, src: url, anchor: [0.48, 0.52], }), }); feature.setStyle(style); this.houseLayer.getSource().addFeature(feature); }); }, //画线 drawLine(){ let pointData = this.lineData; // 所有点位信息 //下边来添加一线feature var feature = new Feature({ type: "lineStyle", geometry: new LineString( pointData // 线的坐标 ), }); let color = 'green'; let lineStyle = new Style({ stroke: new Stroke({ color: color, width: 4, }), }); // 添加线的样式 feature.setStyle(lineStyle); // 添加线的fature this.lineSource.addFeature(feature); }, initMap() { //地图图层 this.layer = new TileLayer({ source: new TileWMS({ //不能设置为0，否则地图不展示。 ratio: 1, url: "http://localhost:8000/geoserver/nyc/wms", params: { LAYERS: "nyc:nyc_roads", STYLES: "", VERSION: "1.1.1", tiled: true }, serverType: "geoserver", }), }); // 红绿灯的图层 this.lightLayer = new VectorLayer({ source: new VectorSource(), }); //房子的图层 this.houseLayer = new VectorLayer({ source: new VectorSource(), }); //线的图层 this.lineSource = new VectorSource({ wrapX: false }); this.lineLayer = new VectorLayer({ source: this.lineSource, }); this.map = new Map({ //地图容器ID target: "map", //引入地图 layers: [this.layer,this.lightLayer,this.houseLayer,this.lineLayer], view: new View({ //地图中心点 center: [987777.93778, 213834.81024], zoom: 12, minZoom:6, // 地图缩放最小级别 maxZoom:19, }), }); this.initLightData(); this.initHouseData(); this.drawLine(); //获取点的监听方法设置 this.onPoint() }, // 获取点 onPoint() { // 监听singleclick事件 this.map.on('singleclick', function(e) { console.log(e.coordinate) }) } }, }; .map { width: 100%; height: 800px; }
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