这篇文章主要讲解了“C++怎么实现百度坐标及GCJ02与WGS84之间的转换”，文中的讲解内容简单清晰，易于学习与理解，下面请大家跟着小编的思路慢慢深入，一起来研究和学习“C++怎么实现百度坐标及GCJ02与WGS84之间的转换”吧！
实现代码
mainwindow.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include <math.h>
typedef struct _POSITION
{
double longitude;
double latitude;
}POSITION;
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();
private slots:
double translate_lon(double lon,double lat);
double translate_lat(double lon,double lat);
bool outof_China(double lon,double lat);
POSITION bd09togcj02(double bd_lon, double bd_lat);
POSITION gcj02tobd09(double gcj_lon,double gcj_lat);
POSITION gcj02towgs84(double gcj_lon,double gcj_lat);
POSITION wgs84togcj02(double wgs_lon,double wgs_lat);
void pushbutton1();
void pushbutton2();
void pushbutton3();
private:
Ui::MainWindow *ui;
POSITION bd_pos;
POSITION gcj_pos;
POSITION wgs_pos;
double x_PI = 3.14159265358979323846 * 3000.0 / 180.0;
double PI = 3.1415926535897932384626;
double a = 6378245.0;
double ee = 0.00669342162296594323;
};
#endif // MAINWINDOW_Hmainwindow.cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
setWindowTitle("Position Translate");
connect(ui->pushButton ,SIGNAL(clicked()),this,SLOT(pushbutton1()));
connect(ui->pushButton_2,SIGNAL(clicked()),this,SLOT(pushbutton2()));
connect(ui->pushButton_3,SIGNAL(clicked()),this,SLOT(pushbutton3()));
}
MainWindow::~MainWindow()
{
delete ui;
}
bool MainWindow::outof_China(double lon, double lat)
{
return(lon<72.004 || lon>137.8374 || lat<0.8293 || lat >55.8271 || false);
}
POSITION MainWindow::bd09togcj02(double bd_lon, double bd_lat)
{
double x = bd_lon - 0.0065;
double 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);
gcj_pos.longitude = z*cos(theta);
gcj_pos.latitude = z*sin(theta);
return gcj_pos;
}
POSITION MainWindow::gcj02tobd09(double gcj_lon, double gcj_lat)
{
double z = sqrt(gcj_lon*gcj_lon + gcj_lat*gcj_lat) + 0.00002*sin(gcj_lat * x_PI);
double theta = atan2(gcj_lat,gcj_lon) + 0.000003 * cos(gcj_lon * x_PI);
bd_pos.longitude = z*cos(theta) + 0.0065;
bd_pos.latitude = z*sin(theta) + 0.006;
return bd_pos;
}
double MainWindow::translate_lon(double lon, double lat)
{
double ret = 300.0 + lon +2.0*lat + 0.1*lon*lon +0.1*lon*lat + 0.1*sqrt(abs(lon));
ret += (20.0 * sin(6.0*lon*PI) + 20.0*sin(2.0*lon*PI)) *2.0 / 3.0;
ret += (20.0 * sin(lon*PI) + 40.0*sin(lon/3.0 *PI)) *2.0 /3.0;
ret += (150 * sin(lon/12.0 *PI) + 300.0*sin(lon/30.0 * PI)) *2.0 /3.0;
return ret;
}
double MainWindow::translate_lat(double lon, double lat)
{
double ret = -100 + 2.0*lon + 3.0*lat + 0.2*lat*lat + 0.1*lon*lat + 0.2*sqrt((abs(lon)));
ret += (20.0 *sin(6.0*lon*PI) + 20*sin(2.0*lon*PI)) *2.0 /3.0;
ret += (20.0 *sin(lat*PI) + 40.0*sin(lat/3.0*PI)) *2.0 /3.0;
ret += (160.0*sin(lat/12.0*PI) + 320.0*sin(lat/30.0 *PI)) *2.0 /3.0;
return ret;
}
POSITION MainWindow::gcj02towgs84(double gcj_lon, double gcj_lat)
{
if(outof_China(gcj_lon,gcj_lat))
{
wgs_pos.longitude = gcj_lon;
wgs_pos.latitude = gcj_lat;
return wgs_pos;
}
else
{
double dlat = translate_lat(gcj_lon - 105.0,gcj_lat -35.0);
double dlon = translate_lon(gcj_lon - 105.0,gcj_lat -35.0);
double radlat = gcj_lat/180.0 *PI;
double magic = sin(radlat);
magic = 1 - ee*magic*magic;
double squrtmagic = sqrt(magic);
dlon = (dlon *180.0)/(a/squrtmagic*cos(radlat)*PI);
dlat = (dlat *180.0)/((a*(1-ee))/(magic * squrtmagic)*PI);
wgs_pos.longitude = gcj_lon - dlon;
wgs_pos.latitude = gcj_lat - dlat;
return wgs_pos;
}
}
POSITION MainWindow::wgs84togcj02(double wgs_lon, double wgs_lat)
{
if(outof_China(wgs_lon,wgs_lat))
{
gcj_pos.longitude = wgs_lon;
gcj_pos.latitude = wgs_lat;
return gcj_pos;
}
else
{
double dlat = translate_lat(wgs_lon - 105.0,wgs_lat - 35.0);
double dlon = translate_lon(wgs_lon - 105.0,wgs_lat - 35.0);
double radlat = wgs_lat/180.0 * PI;
double magic = sin(radlat);
magic = 1 - ee*magic*magic;
double squrtmagic = sqrt(magic);
dlon = (dlon *180.0)/(a/squrtmagic*cos(radlat)*PI);
dlat = (dlat *180.0)/((a*(1-ee))/(magic * squrtmagic)*PI);
gcj_pos.longitude = wgs_lon + dlon;
gcj_pos.latitude = wgs_lat +dlat;
return gcj_pos;
}
}
/*************************************************************************
*
* 读取 BD09 坐标，转换为 WGS84 和 GCJ02 坐标
*
***********************************************************************/
void MainWindow::pushbutton1()
{
double bd09_lon = ui->lineEdit_bd09lon->text().toDouble();
double bd09_lat = ui->lineEdit_bd09lat->text().toDouble();
double gcj02_lon = bd09togcj02(bd09_lon,bd09_lat).longitude;
double gcj02_lat = bd09togcj02(bd09_lon,bd09_lat).latitude;
double wgs84_lon = gcj02towgs84(gcj02_lon,gcj02_lat).longitude;
double wgs84_lat =gcj02towgs84(gcj02_lon,gcj02_lat).latitude;
ui->lineEdit_gcj02lon->setText(QString::number(gcj02_lon,'d',9));
ui->lineEdit_gcj02lat->setText(QString::number(gcj02_lat,'d',9));
ui->lineEdit_wgs84lon->setText(QString::number(wgs84_lon,'d',9));
ui->lineEdit_wgs84lat->setText(QString::number(wgs84_lat,'d',9));
}
/*************************************************************************
*
* 读取 GCJ02 坐标，转换为 WGS84 和 BD09 坐标
*
***********************************************************************/
void MainWindow::pushbutton2()
{
double gcj02_lon = ui->lineEdit_gcj02lon->text().toDouble();
double gcj02_lat = ui->lineEdit_gcj02lat->text().toDouble();
double bd09_lon = gcj02tobd09(gcj02_lon,gcj02_lat).longitude;
double bd09_lat = gcj02tobd09(gcj02_lon,gcj02_lat).latitude;
double wgs84_lon = gcj02towgs84(gcj02_lon,gcj02_lat).longitude;
double wgs84_lat = gcj02towgs84(gcj02_lon,gcj02_lat).latitude;
ui->lineEdit_bd09lon->setText(QString::number(bd09_lon,'d',9));
ui->lineEdit_bd09lat->setText(QString::number(bd09_lat,'d',9));
ui->lineEdit_wgs84lon->setText(QString::number(wgs84_lon,'d',9));
ui->lineEdit_wgs84lat->setText(QString::number(wgs84_lat,'d',9));
}
/*************************************************************************
*
* 读取 WGS84 坐标，转换为 GCJ02 和 BD09 坐标
*
***********************************************************************/
void MainWindow::pushbutton3()
{
double wgs84_lon = ui->lineEdit_wgs84lon->text().toDouble();
double wgs84_lat = ui->lineEdit_wgs84lat->text().toDouble();
double gcj02_lon = wgs84togcj02(wgs84_lon,wgs84_lat).longitude;
double gcj02_lat = wgs84togcj02(wgs84_lon,wgs84_lat).latitude;
double bd09_lon = gcj02tobd09(gcj02_lon,gcj02_lat).longitude;
double bd09_lat = gcj02tobd09(gcj02_lon,gcj02_lat).latitude;
ui->lineEdit_bd09lon->setText(QString::number(bd09_lon,'d',9));
ui->lineEdit_bd09lat->setText(QString::number(bd09_lat,'d',9));
ui->lineEdit_gcj02lon->setText(QString::number(gcj02_lon,'d',9));
ui->lineEdit_gcj02lat->setText(QString::number(gcj02_lat,'d',9));
}算法来源于网上搜集，运行结果如下：