GPS坐标转换代码

OutMyY = MyPrj.y;
//结果：东坐标 y
//////////////////反算//////////////////////////////////////// double InputMyX = 3736714.783; //如果是独立计算，应该给出中央子午线 L0 double InputMyY = 627497.303; MyPrj.Setxy(InputMyX, InputMyY); MyPrj.GetBL(&MyPrj.B, &MyPrj.L); //把计算出的 BL 的弧度值换算为 dms 形式 double OutputMyB; double OutputMyL; OutputMyB = MyPrj.B; //反算结果：B OutputMyL = MyPrj.L; //反算结果：L
{
*dB = Rad2Dms(B);
*dL = Rad2Dms(L);
return true;
}
bool PrjPoint::Setxy(double dx, double dy)
{
x = dx;
y = dy;
xy2BL();
return true;
}
bool PrjPoint::Getxy(double *dx, double *dy)
PrjPoint_Krasovsky MyPrj;
MyPrj.SetL0(MyL0);
MyPrj.SetBL(MyB, MyL);
double OutMyX;
Βιβλιοθήκη Baidu
//结果应该大致是:3736714.783, 627497.303
double OutMyY;
OutMyX = MyPrj.x;
//正算结果: 北坐标 x
} bool PrjPoint::SetBL(double dB, double dL)
{
B = Dms2Rad(dB);
L = Dms2Rad(dL);
//B = dB;
//我靠，I wana say fuck
//L = dL; //del it !
BL2xy();
return true;
}
bool PrjPoint::GetBL(double *dB, double *dL)
* t2 * t2 + 6 * ng2 + 8 * ng2 * t2) * yN * yN * yN * y N * yN / 120.0) / cosB;
return true; } bool PrjPoint::SetL0(double dL0) {
L0 = Dms2Rad(dL0); return true;
#include "stdafx.h " #include "math.h " #include "CoorTrans.h " #include <iostream>
using namespace std;
void main(int argc, char* argv[]) {
double MyL0 = 108; //中央子午线 double MyB = 33.44556666; //33 du 44 fen 55.6666 miao double MyL = 109.22334444; //3 度带，109 d 22 m 33.4444 s
//分析表明，此程序的结果和 Coord4.2 的转换结果是一样的，只差到毫米级 //原程序有几个问题，1.Pi 的值不对。2.SetBL 中多了两行错误代码
}
double Dms2Rad(double Dms) {
double Degree, Miniute; double Second; int Sign; double Rad; if(Dms > = 0)
Sign = 1; else
Sign = -1; Dms = fabs(Dms); Degree = floor(Dms); Miniute = floor(fmod(Dms * 100.0, 100.0)); Second = fmod(Dms * 10000.0, 100.0); Rad = Sign * (Degree + Miniute / 60.0 + Second / 3600.0) * PI / 1
58 * t2 + t2 * t2) * m2 / 720.0) * m2) * m2); y = N * m * ( 1 + m2 * ( (1 - t2 + ng2) / 6.0 + m 2 * ( 5 - 18 * t2 + t2 * t2
+ 14 * ng2 - 58 * ng2 * t2 ) / 120.0)); y += 500000;
cosB = cos(B); t = tan(B); t2 = t * t; N = a / sqrt(1 - e2 * sinB * sinB); m = cosB * (L - L0); m2 = m * m; ng2 = cosB * cosB * e2 / (1 - e2); //x,y 的计算公式见孔祥元等主编武汉大学出版社 2002 年出版的《控制测量学》的第 72 页 //书的的括号有问题， ( 和 [ 应该交换 x = X + N * t * ((0.5 + ((5 - t2 + 9 * ng2 + 4 * ng2 * ng 2) / 24.0 + (61 -
protected: double a, f, e2, e12; // 基本椭球参数 double A1, A2, A3, A4; // 用于计算 X 的椭球参数
return true; } bool PrjPoint::xy2BL() {
double sinB, cosB, t, t2, N ,ng2, V, yN; double preB0, B0; double eta; y -= 500000; B0 = x / A1; do {
preB0 = B0; B0 = B0 * PI / 180.0; B0 = (x - (A2 * sin(2 * B0) + A3 * sin(4 * B0) + A4 * sin
12.0 + (61 + 90 * t2 + 45 * t2 * t2) * yN * yN * yN * y N * yN * yN / 360.0)
* V * V * t / 2; L = L0 + (yN - (1 + 2 * t2 + ng2) * yN * yN * yN / 6. 0 + (5 + 28 * t2 + 24
double Dms2Rad(double Dms); double Rad2Dms(double Rad);
class PrjPoint { public:
double L0; // 中央子午线经度 double B, L; // 大地坐标 double x, y; // 高斯投影平面坐标 public: bool BL2xy(); bool xy2BL();
{ }
//CoorTrans.h 文件 #ifndef _COORTRANS_H_INCLUDED #define _COORTRANS_H_INCLUDED
#include "stdafx.h " #include "math.h "
const double PI = 3.141592653589793;
{
*dx = x;
*dy = y;
return true;
}
///////////////////////////////////////////////////
// Definition of PrjPoint_IUGG1975
///////////////////////////////////////////////////
PrjPoint_IUGG1975::PrjPoint_IUGG1975() //在类外定义构造成员函数，要加上类名和域限定 符 :: {
a = 6378140; f = 298.257; e2 = 1 - ((f - 1) / f) * ((f - 1) / f); e12 = (f / (f - 1)) * (f / (f - 1)) - 1; A1 = 111133.0047; //这几个 A 是什么意思？ A2 = -16038.5282; A3 = 16.8326; A4 = -0.0220; } PrjPoint_IUGG1975::~PrjPoint_IUGG1975() //析构函数，释放构造函数占用的内存 { } /////////////////////////////////////////////////// // Definition of PrjPoint_Krasovsky /////////////////////////////////////////////////// PrjPoint_Krasovsky::PrjPoint_Krasovsky() { a = 6378245; f = 298.3; e2 = 1 - ((f - 1) / f) * ((f - 1) / f); e12 = (f / (f - 1)) * (f / (f - 1)) - 1; A1 = 111134.8611; A2 = -16036.4803; A3 = 16.8281; A4 = -0.0220; } PrjPoint_Krasovsky::~PrjPoint_Krasovsky()
80.0; return Rad;
} double Rad2Dms(double Rad) {
double Degree, Miniute; double Second; int Sign; double Dms; if(Rad > = 0)
Sign = 1; else
Sign = -1; Rad = fabs(Rad * 180.0 / PI); Degree = floor(Rad); Miniute = floor(fmod(Rad * 60.0, 60.0)); Second = fmod(Rad * 3600.0, 60.0); Dms = Sign * (Degree + Miniute / 100.0 + Second / 10000.0); return Dms; } /////////////////////////////////////////////////// // Definition of PrjPoint /////////////////////////////////////////////////// bool PrjPoint::BL2xy() { double X, N, t, t2, m, m2, ng2; double sinB, cosB; X = A1 * B * 180.0 / PI + A2 * sin(2 * B) + A3 * sin (4 * B) + A4 * sin(6 * B); sinB = sin(B);
经纬度 BL 换算到高斯平面直角坐标 XY（高斯投影正算）的源码及算法 收藏
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一、 经纬度 BL 换算到高斯平面直角坐标 XY（高斯投影正算）的源码及算法
// GaussBL2xy.cpp : Defines the entry point for the console application. //
(6 * B0))) / A1; eta = fabs(B0 - preB0);
}while(eta > 0.000000001); B0 = B0 * PI / 180.0; B = Rad2Dms(B0); sinB = sin(B0); cosB = cos(B0); t = tan(B0); t2 = t * t; N = a / sqrt(1 - e2 * sinB * sinB); ng2 = cosB * cosB * e2 / (1 - e2); V = sqrt(1 + ng2); yN = y / N; B = B0 - (yN * yN - (5 + 3 * t2 + ng2 - 9 * ng2 * t2) * y N * yN * yN * yN /