JSP 火星坐标及GPS坐标转百度坐标

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1、火星坐标系 (GCJ-02) 与百度坐标系 (BD-09) 的转换算法

关于 GCJ-02 和 BD-09 ，请参考 http://developer.baidu.com/map/question.htm#qa0043 。

算法代码如下，其中 bd_encrypt 将 GCJ-02 坐标转换成 BD-09 坐标， bd_decrypt 反之。

#include <math.h>

const double x_pi = 3.14159265358979324 * 3000.0 / 180.0;

void bd_encrypt(double gg_lat, double gg_lon, double &bd_lat, double &bd_lon)
{
    double x = gg_lon, y = gg_lat;
    double z = sqrt(x * x + y * y) + 0.00002 * sin(y * x_pi);
    double theta = atan2(y, x) + 0.000003 * cos(x * x_pi);
    bd_lon = z * cos(theta) + 0.0065;
    bd_lat = z * sin(theta) + 0.006;
}

void bd_decrypt(double bd_lat, double bd_lon, double &gg_lat, double &gg_lon)
{
    double x = bd_lon - 0.0065, y = bd_lat - 0.006;
    double z = sqrt(x * x + y * y) - 0.00002 * sin(y * x_pi);
    double theta = atan2(y, x) - 0.000003 * cos(x * x_pi);
    gg_lon = z * cos(theta);
    gg_lat = z * sin(theta);
}

jsp：

var x_pi = 52.35987755982988;

function bd_encrypt(gg_lat, gg_lon)

{

var x = gg_lon, y = gg_lat;

var z = Math.sqrt(x * x + y * y) + 0.00002 * Math.sin(y * x_pi);

var theta = Math.atan2(y, x) + 0.000003 * Math.cos(x * x_pi);

bd_lon = z * Math.cos(theta) + 0.0065;

bd_lat = z * Math.sin(theta) + 0.006;

// alert("x"+bd_lon);

// alert("y"+bd_lat);

var point = new BMap.Point(bd_lon, bd_lat);

return point;

}

2、GPS坐标转百度坐标

参考：http://developer.baidu.com/map/jsdemo.htm#a5_2

<!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;}</style><script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=idpDDCCenuVQ3y5eD9xU1BM4"></script><script type="text/javascript" src="http://developer.baidu.com/map/jsdemo/demo/convertor.js"></script><title>GPS转百度</title></head><body><div id="allmap"></div></body></html><script type="text/javascript">// 百度地图API功能//GPS坐标var xx = 116.397428;var yy = 39.90923;var gpsPoint = new BMap.Point(xx,yy);//地图初始化var bm = new BMap.Map("allmap");bm.centerAndZoom(gpsPoint, 15);bm.addControl(new BMap.NavigationControl());bm.enableScrollWheelZoom();//添加谷歌marker和labelvar markergps = new BMap.Marker(gpsPoint);bm.addOverlay(markergps); //添加GPS标注var labelgps = new BMap.Label("GPS",{offset:new BMap.Size(20,-10)});markergps.setLabel(labelgps); //添加GPS标注//坐标转换完之后的回调函数translateCallback = function (point){    var marker = new BMap.Marker(point);    bm.addOverlay(marker);    var label = new BMap.Label("111111",{offset:new BMap.Size(40,-10)});    marker.setLabel(label); //添加百度label    bm.setCenter(point);    alert(point.lng + "," + point.lat);    }for(var i =0 ;i<3;i++){var xx = 116.397428 + i*5;var yy = 39.90923+i*5;var gpsPoint22 = new BMap.Point(xx,yy); BMap.Convertor.translate(gpsPoint22,0,translateCallback);     //真实经纬度转成百度坐标} </script>

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JSP 火星坐标及GPS坐标 转百度坐标

1、火星坐标系 (GCJ-02) 与百度坐标系 (BD-09) 的转换算法

2、GPS坐标转百度坐标

JSP 火星坐标及GPS坐标转百度坐标