場景
Vue+Openlayers實現地圖上繪制線:
https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/121252960
在上面的基礎上實現點擊地圖,彈窗顯示並獲取點擊處的坐標,並實現坐標轉換經緯度。
效果
加載顯示地圖的流程
Vue中使用Openlayers加載Geoserver發布的TileWMS:
https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/115916949
注:
博客:
https://blog.csdn.net/badao_liumang_qizhi
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實現
1、頁面上添加彈窗的元素
<template> <div id="app"> <div id="map" class="map"></div> <div id="popup" class="ol-popup"> <a href="#" id="popup-closer" class="ol-popup-closer">X</a> <div id="popup-content" class="popup-content"></div> </div> </div> </template>
2、添加彈窗樣式
<style scoped> .map { width: 100%; height: 800px; } .ol-popup { position: absolute; background-color: white; -webkit-filter: drop-shadow(0 1px 4px rgba(0, 0, 0, 0.2)); filter: drop-shadow(0 1px 4px rgba(0, 0, 0, 0.2)); padding: 15px; border-radius: 10px; border: 1px solid #cccccc; bottom: 12px; left: -50px; } .popup-content { width: 400px; } .ol-popup-closer { text-decoration: none; position: absolute; top: 2px; right: 8px; } </style>
3、導入相關模塊
//導入基本模塊 import "ol/ol.css"; import Map from "ol/Map"; import Overlay from "ol/Overlay"; import View from "ol/View"; import { Point,LineString } from "ol/geom"; import Feature from "ol/Feature"; import { Icon,Style,Stroke} from "ol/style"; //導入相關模塊 import { Tile as TileLayer , Vector as VectorLayer } from 'ol/layer' import { TileWMS ,Vector as VectorSource } from 'ol/source' import { toStringHDMS } from "ol/coordinate"; import { toLonLat } from "ol/proj";
4、聲明overlay與容器
overlay: null, container: null, // 彈框
5、在mounted中調用初始化地圖的方法
mounted() { this.initMap(); },
在方法中獲取到彈窗的節點DOM
// 獲取到彈框的節點DOM var container = document.getElementById("popup"); var content = document.getElementById("popup-content"); var closer = document.getElementById("popup-closer"); 然后創建一個彈窗Overlay對象 // 創建一個彈窗 Overlay 對象 this.overlay = new Overlay({ element: container, //綁定 Overlay 對象和 DOM 對象的 autoPan: true, // 定義彈出窗口在邊緣點擊時候可能不完整 設置自動平移效果 autoPanAnimation: { duration: 250 //自動平移效果的動畫時間 9毫秒 } });
6、創建彈窗對象並將彈窗添加到地圖中
this.map = new Map({ //地圖容器ID target: "map", //引入地圖 layers: [this.layer,this.lightLayer,this.houseLayer,this.lineLayer], view: new View({ //地圖中心點 center: [987777.93778, 213834.81024], zoom: 12, minZoom:6, // 地圖縮放最小級別 maxZoom:19, rotation: 0.76 }), }); // 將彈窗添加到 map 地圖中 this.map.addOverlay(this.overlay);
7、監聽地圖的單擊事件,在回調函數中獲取坐標值並將內容賦值給dom
並且設置彈窗的位置就是當前鼠標點擊的位置
// 將彈窗添加到 map 地圖中 this.map.addOverlay(this.overlay); //必須 要重新賦值this,不然再回調函數中指針會變,overlay會undefined let _that = this; // 監聽singleclick事件 this.map.on('singleclick', function(e) { let coordinate = e.coordinate // 點擊尺 (這里是尺(米),並不是經緯度); let hdms = toStringHDMS(toLonLat(e.coordinate)); // 轉換為經緯度顯示 content.innerHTML = ` <p>你點擊了這里:</p> <p>經緯度:<p><code> ${hdms} </code> <p> <p>坐標:</p>X:${coordinate[0]} Y: ${coordinate[1]}`; _that.overlay.setPosition(coordinate); //把 overlay 顯示到指定的 x,y坐標 console.log(e.coordinate) })
8、這里尤其要注意的是,單擊事件的回調方法中要對overplay設置其顯示位置
這里不能再直接使用this.overplay.setPosition了,因為在回調函數中指針會變,
此時會提示overlay為undefined。所以先重新賦值再使用
let _that = this;
_that.overlay.setPosition(coordinate); //把 overlay 顯示到指定的 x,y坐標
7、設置彈窗關閉事件
將overlay對象的setPosition賦值為undefined即可隱藏。
//彈窗關閉事件 closer.onclick=function(){ _that.overlay.setPosition(undefined); closer.blur(); return false; };
8、完整示例代碼
<template> <div id="app"> <div id="map" class="map"></div> <div id="popup" class="ol-popup"> <a href="#" id="popup-closer" class="ol-popup-closer">X</a> <div id="popup-content" class="popup-content"></div> </div> </div> </template> <script> //導入基本模塊 import "ol/ol.css"; import Map from "ol/Map"; import Overlay from "ol/Overlay"; import View from "ol/View"; import { Point,LineString } from "ol/geom"; import Feature from "ol/Feature"; import { Icon,Style,Stroke} from "ol/style"; //導入相關模塊 import { Tile as TileLayer , Vector as VectorLayer } from 'ol/layer' import { TileWMS ,Vector as VectorSource } from 'ol/source' import { toStringHDMS } from "ol/coordinate"; import { toLonLat } from "ol/proj"; export default { name: "olMapImageWMSMulLayers", data() { return { map: null, // map地圖 layer:null, //地圖圖層 lightLayer:null, //燈圖層 houseLayer:null, //房子圖層 lineLayer:null, //線圖層 lineSource:null, //線數據源 overlay: null, container: null, // 彈框 //紅綠燈數據 lightData:[ {x:"987798.93778", y:"213885.81024"}, {x:"987710.93778", y:"213810.81024"}, ], //房子數據 houseData:[ {x:"986610.93778", y:"213885.81024"}, {x:"986510.93778", y:"213810.81024"}, ], //線的數據 lineData:[ [986434.4063822062, 215782.0959711917], [989701.5290279881,217149.84072807242], [990613.3107184113,215946.4192185118], ], }; }, mounted() { this.initMap(); setInterval(() => { this.initLightData(); }, 1000) }, methods: { //初始化紅綠燈數據 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); }); }, //初始化房子數據 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); }); }, //畫線 drawLine(){ let pointData = this.lineData; // 所有點位信息 //下邊來添加一線feature var feature = new Feature({ type: "lineStyle", geometry: new LineString( pointData // 線的坐標 ), }); let color = 'green'; let lineStyle = new Style({ stroke: new Stroke({ color: color, width: 4, }), }); // 添加線的樣式 feature.setStyle(lineStyle); // 添加線的fature this.lineSource.addFeature(feature); }, initMap() { // 獲取到彈框的節點DOM var container = document.getElementById("popup"); var content = document.getElementById("popup-content"); var closer = document.getElementById("popup-closer"); //地圖圖層 this.layer = new TileLayer({ source: new TileWMS({ //不能設置為0,否則地圖不展示。 ratio: 1, url: "http://localhost:8000/geoserver/nyc/wms", params: { LAYERS: "nyc:nyc_roads", STYLES: "", VERSION: "1.1.1", tiled: true }, serverType: "geoserver", }), }); // 紅綠燈的圖層 this.lightLayer = new VectorLayer({ source: new VectorSource(), }); //房子的圖層 this.houseLayer = new VectorLayer({ source: new VectorSource(), }); //線的圖層 this.lineSource = new VectorSource({ wrapX: false }); this.lineLayer = new VectorLayer({ source: this.lineSource, }); // 創建一個彈窗 Overlay 對象 this.overlay = new Overlay({ element: container, //綁定 Overlay 對象和 DOM 對象的 autoPan: true, // 定義彈出窗口在邊緣點擊時候可能不完整 設置自動平移效果 autoPanAnimation: { duration: 250 //自動平移效果的動畫時間 9毫秒 } }); this.map = new Map({ //地圖容器ID target: "map", //引入地圖 layers: [this.layer,this.lightLayer,this.houseLayer,this.lineLayer], view: new View({ //地圖中心點 center: [987777.93778, 213834.81024], zoom: 12, minZoom:6, // 地圖縮放最小級別 maxZoom:19, rotation: 0.76 }), }); // 將彈窗添加到 map 地圖中 this.map.addOverlay(this.overlay); //必須 要重新賦值this,不然再回調函數中指針會變,overlay會undefined let _that = this; // 監聽singleclick事件 this.map.on('singleclick', function(e) { let coordinate = e.coordinate // 點擊尺 (這里是尺(米),並不是經緯度); let hdms = toStringHDMS(toLonLat(e.coordinate)); // 轉換為經緯度顯示 content.innerHTML = ` <p>你點擊了這里:</p> <p>經緯度:<p><code> ${hdms} </code> <p> <p>坐標:</p>X:${coordinate[0]} Y: ${coordinate[1]}`; _that.overlay.setPosition(coordinate); //把 overlay 顯示到指定的 x,y坐標 console.log(e.coordinate) }) //彈窗關閉事件 closer.onclick=function(){ _that.overlay.setPosition(undefined); closer.blur(); return false; }; this.initLightData(); this.initHouseData(); this.drawLine(); }, }, }; </script> <style scoped> .map { width: 100%; height: 800px; } .ol-popup { position: absolute; background-color: white; -webkit-filter: drop-shadow(0 1px 4px rgba(0, 0, 0, 0.2)); filter: drop-shadow(0 1px 4px rgba(0, 0, 0, 0.2)); padding: 15px; border-radius: 10px; border: 1px solid #cccccc; bottom: 12px; left: -50px; } .popup-content { width: 400px; } .ol-popup-closer { text-decoration: none; position: absolute; top: 2px; right: 8px; } </style>