个人网站论文结束语平台seo

前言

本篇文章主要讲解openLayers的初步使用，包括渲染地图、获取点坐标、标记点、中心位置的调整、以及获取到经纬度向后台发送请求
演示地址
官网
gitee链接

效果图

在vue中渲染地图

安装ol插件

npm install ol

1、调用插件

import “ol/ol.css”;
import { Map, View, ol } from “ol”;
import TileLayer from “ol/layer/Tile”;

2、 初始话地图

/*** 初始化地图*/initMap () {var that = this// 创建地图中心点坐标const centerCoordinate = [0, 0];// 初始化视图对象const view = new View({center: centerCoordinate,zoom: 3,projection: "EPSG:4326",});// 创建ArcGIS World Street Map图层const arcGISLayer = new TileLayer({source: new XYZ({// url: "https://server.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer/tile/{z}/{y}/{x}"url: "http://map.geoq.cn/ArcGIS/rest/services/ChinaOnlineStreetPurplishBlue/MapServer/tile/{z}/{y}/{x}"})});// 初始化地图对象this.map = new Map({target: this.$refs.mapContainer,layers: [arcGISLayer],view: view});//鼠标单击事件this.map.on('singleclick', function (e) {that.mapX = e.coordinate[0]that.mapY = e.coordinate[1]that.addVectorLabel(e.coordinate)});return this.map},

3、地图点击事件

// 定义点createLabelStyle (feature) {return new Style({/**{olx.style.IconOptions}类型*/image: new Icon(({anchor: [0.5, 60],anchorOrigin: 'top-right',anchorXUnits: 'fraction',anchorYUnits: 'pixels',offsetOrigin: 'top-right',// offset:[0,10],//图标缩放比例scale: 0.1,//透明度opacity: 0.75,//图标的urlsrc: require("../assets/gd.png")}))});},// 添加坐标点addVectorLabel (coordinate) {if (this.vectorSource) {this.vectorSource.clear()} else {//矢量标注的数据源this.vectorSource = new VectorSource({features: []})}// //矢量标注图层this.vectorLayer = new VectorLayer({source: this.vectorSource});this.map.addLayer(this.vectorLayer);//新建一个要素var newFeature = new Feature({//几何信息geometry: new Point(coordinate)});//设置要素的样式newFeature.setStyle(this.createLabelStyle(newFeature));this.vectorSource.addFeature(newFeature);}

4、重置坐标

CZ () {this.vectorSource.clear()this.mapX = ''this.mapY = ''},

5、通过坐标改变视图

DW () {
var view = this.map.getView();
var py = ([parseInt(this.mapX), parseInt(this.mapY)]);
//平移地图
view.setCenter(py);
this.addVectorLabel([this.mapX, this.mapY])
view.setZoom(9);
},

6、保存坐标点

BC () {var parpms = {mapX: this.mapX,mapY: this.mapY}const instance = axios.create({baseURL: 'https://127.0.0.1'});instance.post('/api/data', parpms).then(response => {// response.data;//请求返回的数据}).catch(error => {console.log(error);});},

vue中使用的源码

<template><div><div id="map-container" ref="mapContainer" class="map-container"></div><div class="formList"><div class="input"><div class="name">北纬:</div><el-input v-model="mapX" placeholder="请输入内容"></el-input></div><div class="input"><div class="name">东经：</div><el-input v-model="mapY" placeholder="请输入内容"></el-input></div><div class="button" @click='CZ'>重置</div><div class="button" @click='DW'>定位</div><div class="button" @click='BC'>保存</div></div></div></template><script>
import "ol/ol.css";import { fromLonLat } from "ol/proj";
import { OSM, Vector as VectorSource, Raster as RasterSource } from "ol/source";
import { Vector as VectorLayer } from "ol/layer";
import { Fill, Style, Stroke, Icon, Circle as CircleStyle } from "ol/style";
import { Point } from "ol/geom"; //标点,画线
import Feature from "ol/Feature";
import { Map, View, ol } from "ol";
import TileLayer from "ol/layer/Tile";
import XYZ from "ol/source/XYZ";
import axios from 'axios';export default {name: "MapComponent",data () {return {mapX: '',mapY: '',};},mounted () {this.map = this.initMap()},methods: {/*** 初始化地图*/initMap () {var that = this// 创建地图中心点坐标const centerCoordinate = [0, 0];// 初始化视图对象const view = new View({center: centerCoordinate,zoom: 3,projection: "EPSG:4326",});// 创建ArcGIS World Street Map图层const arcGISLayer = new TileLayer({source: new XYZ({url: "http://map.geoq.cn/ArcGIS/rest/services/ChinaOnlineStreetPurplishBlue/MapServer/tile/{z}/{y}/{x}"})});// 初始化地图对象this.map = new Map({target: this.$refs.mapContainer,layers: [arcGISLayer],view: view});//鼠标单击事件this.map.on('singleclick', function (e) {that.mapX = e.coordinate[0]that.mapY = e.coordinate[1]that.addVectorLabel(e.coordinate)});return this.map},CZ () {this.vectorSource.clear()this.mapX = ''this.mapY = ''},DW () {var view = this.map.getView();var py = ([parseInt(this.mapX), parseInt(this.mapY)]);//平移地图view.setCenter(py);this.addVectorLabel([this.mapX, this.mapY])view.setZoom(9);},BC () {var parpms = {mapX: this.mapX,mapY: this.mapY}const instance = axios.create({baseURL: 'https://127.0.0.1'});instance.post('/api/data', parpms).then(response => {// response.data;//请求返回的数据}).catch(error => {console.log(error);});},// 定义点createLabelStyle (feature) {return new Style({/**{olx.style.IconOptions}类型*/image: new Icon(({anchor: [0.5, 60],anchorOrigin: 'top-right',anchorXUnits: 'fraction',anchorYUnits: 'pixels',offsetOrigin: 'top-right',// offset:[0,10],//图标缩放比例scale: 0.1,//透明度opacity: 0.75,//图标的urlsrc: require("../assets/gd.png")}))});},// 添加坐标点addVectorLabel (coordinate) {if (this.vectorSource) {this.vectorSource.clear()} else {//矢量标注的数据源this.vectorSource = new VectorSource({features: []})}// //矢量标注图层this.vectorLayer = new VectorLayer({source: this.vectorSource});this.map.addLayer(this.vectorLayer);//新建一个要素var newFeature = new Feature({//几何信息geometry: new Point(coordinate)});//设置要素的样式newFeature.setStyle(this.createLabelStyle(newFeature));this.vectorSource.addFeature(newFeature);}}
};
</script><style>
.map-container {width: 100%;height: 100vh;margin: 0;padding: 0;
}.formList {position: fixed;top: 10px;left: 50px;display: flex;
}.formList div {margin-left: 20px;
}.button {width: 50px;line-height: 40px;background-color: #f68e41;border-radius: 3px;color: #fff;
}.input {display: flex;
}.input .name {line-height: 40px;width: 25%;
}
</style>