百度地圖自帶了定位的api，但是這個定位的精確度確實太低了。
所以我就用瀏覽器自帶的GPS功能獲取GPS座標，再通過百度地圖座標轉換的功能，初始化百度地圖。
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<style type="text/css">
body,
html,
#allmap {
width: 100%;
height: 100%;
overflow: hidden;
margin: 0;
font-family: "微軟雅黑";
}
</style>
<script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=這裏替換成你自己的"></script>
<title>GPS轉百度</title>
</head>
<body>
<div id="allmap"></div>
</body>
</html>
<script type="text/javascript">
if(navigator.geolocation) {
navigator.geolocation.getCurrentPosition(showPosition, showError); // HTML5獲取GPS設備地理位置信息
} else {
document.getElementById("allmap").innerHTML = "Geolocation is not supported by this browser.";
}
function showPosition(position) {
var y = position.coords.latitude; // 獲取經度
var x = position.coords.longitude; // 獲取緯度
initMap(x, y);
}
// HTML5獲取地理位置信息錯誤處理
function showError(error) {
switch(error.code) {
case error.PERMISSION_DENIED:
document.getElementById("allmap").innerHTML = "User denied the request for Geolocation."
break;
case error.POSITION_UNAVAILABLE:
document.getElementById("allmap").innerHTML = "Location information is unavailable."
break;
case error.TIMEOUT:
document.getElementById("allmap").innerHTML = "The request to get user location timed out."
break;
case error.UNKNOWN_ERROR:
document.getElementById("allmap").innerHTML = "An unknown error occurred."
break;
}
}
function initMap(x, y) {
// 百度地圖API功能
//GPS座標
var ggPoint = new BMap.Point(x, y);
//地圖初始化
var bm = new BMap.Map("allmap");
bm.centerAndZoom(ggPoint, 15);
bm.addControl(new BMap.NavigationControl());
//添加gps marker和label
var markergg = new BMap.Marker(ggPoint);
bm.addOverlay(markergg); //添加GPS marker
var labelgg = new BMap.Label("未轉換的GPS座標（錯誤）", {
offset: new BMap.Size(20, -10)
});
markergg.setLabel(labelgg); //添加GPS label
//座標轉換完之後的回調函數
translateCallback = function(data) {
if(data.status === 0) {
var marker = new BMap.Marker(data.points[0]);
bm.addOverlay(marker);
var label = new BMap.Label("轉換後的百度座標（正確）", {
offset: new BMap.Size(20, -10)
});
marker.setLabel(label); //添加百度label
bm.setCenter(data.points[0]);
}
}
setTimeout(function() {
var convertor = new BMap.Convertor();
var pointArr = [];
pointArr.push(ggPoint);
convertor.translate(pointArr, 1, 5, translateCallback)
}, 1000);
}
</script>