using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ToLatLon
{
internal class Program
{
private static void Main(string[] args)
{
Console.Write("\n UTM to LatLon test.\n From theSwamp\n http://www.theswamp.org/index.php?topic=48330.0" );
Console.Write("\n\nEnter utmX value : " );
double utmX = double.Parse(Console.ReadLine());
Console.Write("\nEnter utmY value : " );
double utmY = double.Parse(Console.ReadLine());
Console.Write("\nEnterutmZone value : " );
string utmZone = Console.ReadLine();
ToLatLon(utmX, utmY, utmZone);
Console.ReadKey();
}
public static void ToLatLon(double utmX, double utmY, string utmZone)
{
double latitude = 0;
double longitude = 0;
bool isNorthHemisphere = utmZone.Last() >= 'N';
var diflat = -0.00066286966871111111111111111111111111;
var diflon = -0.0003868060578;
var zone = int.Parse(utmZone.Remove(utmZone.Length - 1));
var c_sa = 6378137.000000;
var c_sb = 6356752.314245;
var e2 = Math.Pow((Math.Pow(c_sa, 2) - Math.Pow(c_sb, 2)), 0.5)/c_sb;
Console.WriteLine("\ne2:\t " + e2.ToString());
var e2cuadrada = Math.Pow(e2, 2);
Console.WriteLine("\ne2cuadrada:\t " + e2cuadrada.ToString());
var c = Math.Pow(c_sa, 2)/c_sb;
Console.WriteLine("\nc:\t " + c.ToString());
var x = utmX - 500000;
Console.WriteLine("\nx:\t " + x.ToString());
var y = isNorthHemisphere ? utmY : utmY - 10000000;
Console.WriteLine("\ny:\t " + y.ToString());
var s = ((zone*6.0) - 183.0);
Console.WriteLine("\ns:\t " + s.ToString());
var lat = y/(6366197.724*0.9996); // Change c_sa for 6366197.724
Console.WriteLine("\nlat:\t " + lat.ToString());
var v = (c/
Math.Pow(1 + (e2cuadrada*Math.Pow(Math.Cos(lat), 2)), 0.5))*
0.9996;
Console.WriteLine("\nv:\t " + v.ToString());
var a = x/v;
Console.WriteLine("\na:\t " + a.ToString());
var a1 = Math.Sin(2*lat);
Console.WriteLine("\na1:\t " + a1.ToString());
var a2 = a1*Math.Pow((Math.Cos(lat)), 2);
Console.WriteLine("\na2:\t " + a2.ToString());
var j2 = lat + (a1/2.0);
Console.WriteLine("\nj2:\t " + j2.ToString());
var j4 = ((3*j2) + a2)/4.0;
Console.WriteLine("\nj4:\t" + j4.ToString());
var j6 = (5*j4 + a2*Math.Pow((Math.Cos(lat)), 2))/3.0;
// saque a2 de multiplicar por el coseno de lat y elevar al cuadrado
Console.WriteLine("\nj6:\t " + j6.ToString());
var alfa = (3.0/4.0)*e2cuadrada;
Console.WriteLine("\nalfa:\t " + alfa.ToString());
var beta = (5.0/3.0)*Math.Pow(alfa, 2);
Console.WriteLine("\nbeta:\t " + beta.ToString());
var gama = (35.0/27.0)*Math.Pow(alfa, 3);
Console.WriteLine("\ngama:\t " + gama.ToString());
var bm = 0.9996*c*(lat - alfa*j2 + beta*j4 - gama*j6);
Console.WriteLine("\nbm:\t " + bm.ToString());
var b = (y - bm)/v;
Console.WriteLine("\nb:\t " + b.ToString());
var epsi = ((e2cuadrada*Math.Pow(a, 2))/2.0)*
Math.Pow((Math.Cos(lat)), 2);
Console.WriteLine("\nepsi:\t " + epsi.ToString());
var eps = a*(1 - (epsi/3.0));
Console.WriteLine("\neps:\t " + eps.ToString());
var nab = (b*(1 - epsi)) + lat;
Console.WriteLine("\nnab:\t " + nab.ToString());
var senoheps = (Math.Exp(eps) - Math.Exp(-eps))/2.0;
Console.WriteLine("\nsenoheps:\t " + senoheps.ToString());
var delt = Math.Atan(senoheps/(Math.Cos(nab)));
Console.WriteLine("\ndelt:\t " + delt.ToString());
var tao = Math.Atan(Math.Cos(delt)*Math.Tan(nab));
Console.WriteLine("\ntao:\t " + tao.ToString());
longitude = (delt/Math.PI)*180 + s;
latitude = (((lat +
(1 + e2cuadrada*Math.Pow(Math.Cos(lat), 2) -
(3.0/2.0)*e2cuadrada*Math.Sin(lat)*Math.Cos(lat)*
(tao - lat))*(tao - lat)))/Math.PI)*180;
// era incorrecto el calculo
Console.WriteLine("\nLatitud:\t " + latitude.ToString() +
"\nLongitud:\t " + longitude.ToString());
}
}
}
