Openlayers地图操作（一）实现简单的气泡弹窗

Openlayers地图初始化代码：<!DOCTYPE html><html><head><meta charset="UTF-8"><link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/openlayers/openlayers.github.io@master/en/v6.5.0/

肆月二十二

1524人浏览 · 2021-10-11 14:55:11

肆月二十二 · 2021-10-11 14:55:11 发布

好久好久没有更新—别问，问就是懒话不多说，直接上代码

<!DOCTYPE html>
<html>
<head>
    <title>Overlay</title>
    <link rel="stylesheet" href="https://openlayers.org/en/v5.3.0/css/ol.css" type="text/css">
    <!-- The line below is only needed for old environments like Internet Explorer and Android 4.x -->
    <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL"></script>
    <script src="https://openlayers.org/en/v5.3.0/build/ol.js"></script>
    <script src="https://code.jquery.com/jquery-2.2.3.min.js"></script>
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
    <style>
        #marker {
            width: 20px;
            height: 20px;
            border: 1px solid #088;
            border-radius: 10px;
            background-color: #0FF;
            opacity: 0.5;
        }
        #vienna {
            text-decoration: none;
            color: white;
            font-size: 11pt;
            font-weight: bold;
            text-shadow: black 0.1em 0.1em 0.2em;
        }
        .popover-content {
            min-width: 180px;
        }
    </style>
</head>
<body>
<div id="map" class="map"></div>
<div style="display: none;">
    <!-- Clickable label for Vienna -->
    <a class="overlay" id="vienna" target="_blank" href="http://en.wikipedia.org/wiki/Vienna">Vienna</a>
    <div id="marker" title="Marker"></div>
    <!-- Popup -->
    <div id="popup" title="经纬度获取"></div>
</div>
<script>
    var fillpt = new ol.style.Fill({
        color: 'rgba(255,255,0,0.5)'
    });
    var fill = new ol.style.Fill({
        color: 'rgba(255,0,0,0.5)'
    });
    var stroke = new ol.style.Stroke({
        color: '#3399CC',
        width: 1.25
    });

    var styles = [
        new ol.style.Style({
            image: new ol.style.Circle({
                fill: fillpt,
                stroke: stroke,
                radius: 15
            }),
            fill: fill
            ,
            stroke: stroke
        })
    ];

    var labelCoords_org=[120, 40];
    var labelCoords=ol.proj.transform(labelCoords_org, "EPSG:4326", "EPSG:3857");
    var feature = new ol.Feature({
        geometry: new ol.geom.Point(labelCoords)
    });
    //    vLayer
    var vLayer = new ol.layer.Vector({
        source: new ol.source.Vector({features:[feature]}),
        style:styles
    });
    var layer = new ol.layer.Tile({
        source: new ol.source.OSM()
    });
    var map = new ol.Map({
        layers: [layer,vLayer],
        target: 'map',
        view: new ol.View({
            center: [0, 0],
            zoom: 2
        })
    });
    var pos = ol.proj.fromLonLat([16.3725, 48.208889]);
    // Vienna marker
    var marker = new ol.Overlay({
        position: pos,
        positioning: 'center-center',
        element: document.getElementById('marker'),
        stopEvent: false
    });
    map.addOverlay(marker);
    // Vienna label
    var vienna = new ol.Overlay({
        position: pos,
        element: document.getElementById('vienna')
    });
    map.addOverlay(vienna);
    // Popup showing the position the user clicked
    var popup = new ol.Overlay({
        element: document.getElementById('popup')
    });
    map.addOverlay(popup);
    map.on('click', function(evt) {
        var pixel = map.getEventPixel(evt.originalEvent);
        var feature = map.forEachFeatureAtPixel(pixel, function(feature) {
            return feature;
        });
        if(feature){
            var element = popup.getElement();
            var coordinate = evt.coordinate;
            var hdms = ol.coordinate.toStringHDMS(ol.proj.transform(
                    coordinate, 'EPSG:3857', 'EPSG:4326'));
            $(element).popover('destroy');
            popup.setPosition(coordinate);
            $(element).popover({
                'placement': 'top',
                'animation': false,
                'html': true,
                'content': '<p>你点击的地方是:</p><code>' + hdms + '</code>'
            });
            $(element).popover('show');
        }else{
            var element = popup.getElement();
            $(element).popover('destroy');
        }
    });
</script>
</body>
</html>```

```javascript

在这里插入图片描述
上面圈起来的地方就是点击出现的弹窗，下面来看一下最主要的代码

element中定义的是你div popup的容器，其中涉及了一个点击事件，这个等以后有时间详细写一下。
popup.setPosition(coordinate); 这个是弹窗存放的位置
其实没啥可说的，就大概看一下源码就懂了，然后去openlayer官网搜一下overlay，看一下api，下次讲解一下overlay的三种加载方法
在这里插入图片描述

AtomGit 开源协作平台测评赛

瓜分20万奖金获得内推名额丰厚实物奖励易参与易上手

更多推荐

ADS1292R 使用过程心电图高精度ADC模块

文章目录1 Fundamentals ofPrecision ADC Noise Analysis 精密模数转换器噪声分析基础1 Fundamentals ofPrecision ADC Noise Analysis 精密模数转换器噪声分析基础https://www.ti.com.cn/cn/lit/wp/slyy192/slyy192.pdf?ts=1600659610730&ref_u

开放原子开发者工作坊

实现一个家庭安防与环境监测系统（一）

开放原子开发者工作坊

【cf】Codeforces Round #774 (Div. 2) 前4题

题目A. Square Counting 简单数学题目大意题解代码B. Quality vs Quantity 排序题目大意题解代码C. Factorials and Powers of Two 状态压缩dp+位运算题目大意题解代码D. Weight the Tree 树形dp+dfs题目大意题解代码E. Power Board 看起来像是数论？许多年没打cf了，偶尔打了一盘，恢复紫名了。A. S