百度坐标转换API使用
http://api.map.baidu.com/geoconv/v1/?coords=121.54759,29.870724&from=1&to=5&ak=sGSOaO07WkRHHiCRxxbSQVBn
前提：121.54759,29.870724 是由手机硬件或谷歌地图获取的
错误的方法一：
function standard2china(lng,lat){
//http://api.map.baidu.com/geoconv/v1/?coords=121.54759,29.870724&from=1&to=5&ak=sGSOaO07WkRHHiCRxxbSQVBn
var apiurl="http://api.map.baidu.com/geoconv/v1/?coords="+lng+","+lat+"&from=1&to=5&ak=sGSOaO07WkRHHiCRxxbSQVBn";
$.ajax({
url:apiurl,
type:'get',
success:function(data){
console.log(data);
}
});
}
会提示错误：No 'Access-Control-Allow-Origin' header is present on the requested resource.
这是跨域问题，见：http://blog.csdn.net/zengmingen/article/details/51321758
错误方法二：
知道了跨域问题，解决要用dataType:'jsonp'
function standard2china(lng,lat){
//http://api.map.baidu.com/geoconv/v1/?coords=121.54759,29.870724&from=1&to=5&ak=sGSOaO07WkRHHiCRxxbSQVBn
var apiurl="http://api.map.baidu.com/geoconv/v1/?coords="+lng+","+lat+"&from=1&to=5&ak=sGSOaO07WkRHHiCRxxbSQVBn";
$.ajax({
url:apiurl,
type:'get',
dataType:'jsonp',
success:function(data){
console.log(data);
}
});
}不提示报错，但是返回结果是百度的js文件内容：
正确方法：
百度demo：http://developer.baidu.com/map/jsdemo.htm#a5_2
<!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>无标题文档</title>
<script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=sGSOaO07WkRHHiCRxxbSQVBn"></script>
<script type="text/javascript">
abc();
function abc(){
var x = 121.5473;
var y = 29.87061;
var ggPoint = new BMap.Point(x,y);
var convertor = new BMap.Convertor();
//坐标转换完之后的回调函数
translateCallback = function (data){
if(data.status === 0) {
for (var i = 0; i < data.points.length; i++) {
var newPoint=data.points[i];
console.log(newPoint.lng);
console.log(newPoint.lat);
}
}
}
setTimeout(function(){
var convertor = new BMap.Convertor();
var pointArr = [];
pointArr.push(ggPoint);
convertor.translate(pointArr, 1, 5, translateCallback);
}, 1000);
}
</script>
</head>
<body>
</body>
</html>