public void TestBLtoXY()
{
{
double B = SurMath.DMStoRad(21.58470845);
double L = SurMath.DMStoRad(113.25314880);
double L0 = SurMath.DMStoRad(111);
//Ellipsoid ellipsoid = new Ellipsoid(6378245, 298.3);
Ellipsoid ellipsoid = Ellipsoid.CreateBeijing1954();
IProj proj = new GaussProj(ellipsoid);
var xy = proj.BLtoXY(B, L, L0, 0, 0);
Assert.AreEqual(2433586.692, xy.X, 0.001);
Assert.AreEqual(250547.403, xy.Y, 0.001);
}
//数据来自《大地测量学基础》2版P193
{
double B = SurMath.DMStoRad(17.33557339);
double L = SurMath.DMStoRad(119.15521159);
double L0 = SurMath.DMStoRad(117);
Ellipsoid ellipsoid = Ellipsoid.CreateBeijing1954();
IProj proj = new GaussProj(ellipsoid);
var xy = proj.BLtoXY(B, L, L0, 0, 0);
Assert.AreEqual(1944359.6070, xy.X, 0.003);
Assert.AreEqual(240455.4563, xy.Y, 0.001);
}
//数据来自《大地测量学基础》2版P193
{
double B = SurMath.DMStoRad(17.33557339);
double L = SurMath.DMStoRad(119.15521159);
double L0 = SurMath.DMStoRad(117);
Ellipsoid ellipsoid = Ellipsoid.CreateXiAn1980();
IProj proj = new GaussProj(ellipsoid);
var xy = proj.BLtoXY(B, L, L0, 0, 0);
Assert.AreEqual(1944325.8030, xy.X, 0.001);
Assert.AreEqual(240451.5085, xy.Y, 0.001);
}
}
public void TestXYtoBL()
{
{
double x = 2433586.692, y = 250547.403;
double L0 = SurMath.DMStoRad(111);
Ellipsoid ellipsoid = Ellipsoid.CreateBeijing1954();
IProj proj = new GaussProj(ellipsoid);
//IProj proj = new UTMProj(ellipsoid);
var BL = proj.XYtoBL(x, y, L0, 0, 0);
Assert.AreEqual(21.58470845, SurMath.RadtoDMS(BL.B), 1e-8);
Assert.AreEqual(113.25314880, SurMath.RadtoDMS(BL.L), 1e-8);
x = 3380330.773; y = 320089.9761;
BL = proj.XYtoBL(x, y, L0, 0, 0);
//此处的秒按常规处理会出现59.999996秒的问题
Assert.AreEqual(30.30, SurMath.RadtoDMS(BL.B), 1e-7);
Assert.AreEqual(114.20, SurMath.RadtoDMS(BL.L), 1e-7);
}
//数据来自《大地测量学基础》2版P194
{
double x = 1944359.6070, y = 240455.4563;
double L0 = SurMath.DMStoRad(117);
Ellipsoid ellipsoid = Ellipsoid.CreateBeijing1954();
IProj proj = new GaussProj(ellipsoid);
//IProj proj = new UTMProj(ellipsoid);
var BL = proj.XYtoBL(x, y, L0, 0, 0);
Assert.AreEqual(17.33557338, SurMath.RadtoDMS(BL.B), 1e-8);
Assert.AreEqual(119.15521150, SurMath.RadtoDMS(BL.L), 1e-8);
}
}