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JSP 火星坐标及GPS坐标 转百度坐标

2015-06-04 15:41 811 查看
转自： http://blog.csdn.net/ma969070578/article/details/38257691



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)
[align=left]{ [/align]
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);
[align=left] bd_lon = z * Math.cos(theta) + 0.0065; [/align]
[align=left] bd_lat = z * Math.sin(theta) + 0.006;[/align]
[align=left] [/align]
//
alert("x"+bd_lon);
//
alert("y"+bd_lat);
var point
= new BMap.Point(bd_lon,
bd_lat);
[align=left] return point;[/align]
[align=left]} [/align]

2、GPS坐标转百度坐标

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

[javascript] view
plaincopy





<!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label

var 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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