日期:2014-05-17 浏览次数:20766 次
<!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 http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>I am Baron</title> <script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script> </head> <body> <span id="abc"></span> <span id="status"></span> <table border="1"> <tr> <th >纬度</th> <td id="latitude">?</td> </tr> <tr> <td>经度</td> <td id="longitude">?</td> </tr> <tr> <td >准确性</td> <td id="accuracy">?</td> </tr> <tr> <td>最后时间戳</td> <td id="timestamp">?</td> </tr> </table> <h4 id="currdist"></h4> <h4 id="totaldist"></h4> <div id="map" style="width:500px; height:600px; background-color:#000; opacity:0.85; margin-left:25%; margin-right:25%; margin-top:-180px;"></div> <script type="text/javascript"> var totaldistance=0.0; var lastlat; var lastlong; function updateStatus(message){ document.getElementById("status").innerHTML=message; } //javascript 实现的Haversine公式 function toRadians(degree){ return degree * Math.PI /180 ; } function distance(latitude1,longitude1,latitude2,longitude2){ //R 是地球半径,以KM为单位 var R=6371; var deltalatitude=toRadians(latitude2-latitude1); var detalongitude=toRadians(longitude2-longitude1); latitude1=toRadians(latitude2); var a = Math.sin(deltalatitude/2) * Math.sin(deltalatitude/2)+ Math.cos(latitude1) * Math.cos(latitude2) * Math.sin(detalongitude/2) * Math.sin(detalongitude/2); var c=2*Math.atan(Math.sqrt(a),Math.sqrt(1-a)); var d=R*c; return d; } function loaddemo(){ if(navigator.geolocation){ updateStatus("浏览器支持"); navigator.geolocation.watchPosition(updatelocation,handlocationError,{maximumAge:2000}); }else{ updateStatus("你的浏览器不支持,请使用Google Chrome。"); } } window.addEventListener("load",loaddemo,true); function endRequest(){updateStatus("完成");} function updatelocation(position){ endRequest(); var latitude=position.coords.latitude; var longitude=position.coords.longitude; var accuracy=position.coords.accuracy; var timestamp=position.timestamp; document.getElementById("latitude").innerHTML=latitude; document.getElementById("longitude").innerHTML=longitude; document.getElementById("accuracy").innerHTML=accuracy; document.getElementById("timestamp").innerHTML=timestamp; //合理性检测----如果accuracy 太大,就不要计算距离 if(accuracy>500){ updateStatus("误差太大"); // return ; } //计算距离 if((lastlat!==null) && (lastlong!=null)){ var currentdistance=distance(latitude,longitude,lastlat,lastlong); document.getElementById("currdist").innerHTML="目前的距离"+currentdistance.toFixed(4)+"KM"; totaldistance += currentdistance; document.getElementById("totaldist").innerHTML="总距离"+totaldistance.toFixed(4)+"KM"; } lastlat=latitude; lastlong=longitude; initialize(position.coords.latitude,position.coords.longitude,"Your address","你有没有在这附近呢?"); updateStatus("位置更新成功"); } // Google Map function initialize(latitude,longitude,title,sysinfo) { var newark = new google.maps.LatLng(latitude, longitude); var imageBounds = new google.maps.LatLngBounds( new google.maps.LatLng(latitude,longitude)); var myOptions = { zoom: 13, //地图的缩放程度 center: newark, //地图中心位置 mapTypeId: google.maps.MapTypeId.ROADMAP } //把地图绑定在id为map的di