代码改变世界

利用 Google API 调用谷歌地图 演示15 - 经纬度

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代码如下：

 

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
    <meta http-equiv="content-type" content="text/html; charset=UTF-8" />
    <title>Demo19-搜索经纬度</title>
    <style type="text/css">
        html { height: 100%; }
        body { height: 100%; margin: 0px; padding: 0px; }
        .search { margin:50px auto; width:50%; }
        #map_canvas { width:50%; height: 50%; margin: 50px auto; }
    </style>
    <script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
    <script type="text/javascript">
        var geocoder;
        var map;
        var infowindow = new google.maps.InfoWindow();
        var marker;
        function initialize()
        {
            geocoder = new google.maps.Geocoder();
            var latlng = new google.maps.LatLng(22.95, 113.4);
            var myOptions = {
                zoom: 4,
                center: latlng,
                mapTypeId: google.maps.MapTypeId.ROADMAP
            }
            map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
        }
        function codeLatLng()
        {
            var input = document.getElementById("latlng").value;
            var latlngStr = input.split(",", 2);
            var lat = parseFloat(latlngStr[0]);
            var lng = parseFloat(latlngStr[1]);
            var latlng = new google.maps.LatLng(lat, lng);
            geocoder.geocode({ 'latLng': latlng }, function(results, status)
            {
                if (status == google.maps.GeocoderStatus.OK)
                {
                    if (results[1])
                    {
                        map.setZoom(4);
                        marker = new google.maps.Marker({
                            position: latlng,
                            map: map
                        });
                        infowindow.setContent(results[1].formatted_address);
                        infowindow.open(map, marker);
                    }
                    else
                    {
                        alert("没有记录");
                    }
                } else
                {
                    alert("Geocoder failed due to: " + status);
                }
            });
        }
    </script>
</head>
<body onload="initialize()">
    <div class="search">
        请输入经纬度：<input id="latlng" type="text" value="29,111.7"/><input type="button" value="搜索" onclick="codeLatLng()"/>
    </div>
    <div id="map_canvas">
    </div>
</body>
</html>

 

效果图如下：

 

 

谢谢浏览！

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