高德地图 JS API示例-坐标系转换-其他坐标 -> 高德坐标

<!doctype html>
<html>
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no, width=device-width">
    <title>其他坐标变换成高德坐标</title>
    <link rel="stylesheet" href="https://a.amap.com/jsapi_demos/static/demo-center/css/demo-center.css"/>
    <style>
        html,body,#container{
            height:100%;
            width:100%;
        }
        .btn-box{
            position: absolute;
            right: 5rem;
            top: 5rem;
        }
        .btn{
            background: '#0277bd';
            width: 14em;
            margin-left: 3.2rem;  
            margin-top: 0.8rem; 
        }
    </style>
</head>
<body>
<div id="container"></div>
<div class="input-card" style="width:18rem">
    <h4>坐标转换</h4>
    <div id="coordinate">
      <div class="input-item"><input id="gps" name="language" type="radio" checked="checked"><span class="input-text">GPS 坐标转为高德坐标</span></div>
      <div class="input-item"><input id="mapbar" name="language" type="radio"><span class="input-text">图吧坐标转为高德坐标</span></div>
      <div class="input-item"><input id="baidu" name="language" type="radio"><span class="input-text">百度坐标转为高德坐标</span></div>
    </div>
</div>

<script type="text/javascript" src="https://webapi.amap.com/maps?v=1.4.15&key=您申请的key值&plugin=AMap.Geocoder"></script>
<script type="text/javascript">
    var map = new AMap.Map("container", {
        resizeEnable: true,
        center: [116.473222,39.993214],
        zoom: 15
    });

    var $ = function(elementId){
        return document.getElementById(elementId);
    };

    // 创建gps坐标位置点标记
    var lnglat = [116.46706996,39.99188446];
    var m1 = new AMap.Marker({
        position: lnglat,
        icon: "https://webapi.amap.com/theme/v1.3/markers/n/mark_r.png"
    });
    map.add(m1);
    m1.setLabel({
        offset: new AMap.Pixel(20, 20),
        content: "GPS 坐标系中首开广场"
    });
    var m2;

    // 坐标转换
    function convertFrom(lnglat, type){
        AMap.convertFrom(lnglat, type, function (status, result) {
          if (result.info === 'ok') {
            var resLnglat = result.locations[0];
            m2 = new AMap.Marker({
                position: resLnglat,
            });
            map.add(m2);
            // 设置标签
            m2.setLabel({
                offset: new AMap.Pixel(20, 20),
                content: "高德坐标系中首开广场（正确）"
            });
          }
        });
    }
    convertFrom(lnglat,'gps');
   

    function setCoordinate() {
        var type = this.id;
        var m1Text = "GPS 坐标系中首开广场";
        if(type == 'mapbar'){
            m1Text = '图吧坐标系中首开广场';
            lnglat = [116.46179996,39.99241446]; // 图吧坐标系下首开广场
        }else if(type == 'baidu'){
            m1Text = '百度坐标系中首开广场';
            lnglat = [116.4798674287,39.9989020876]; // 百度坐标系下首开广场
        }else if(type == 'gps'){
            lnglat = [116.46706996,39.99188446]; // 百度坐标系下首开广场
        }
        // 设置label标签
        m1.setLabel({
            offset: new AMap.Pixel(20, 20),
            content: m1Text
        });
        m1.setPosition(lnglat);
        map.remove(m2);
        // 坐标转换
        convertFrom(lnglat,type);

    }
    
    //绑定radio点击事件
    var radios = document.querySelectorAll("#coordinate input");
    radios.forEach(function(ratio) {
      ratio.onclick = setCoordinate;
    });


</script>
</body>
</html>
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