Android Open Source - space-digitizing Geo Helper

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License

The source code is released under:

MIT License

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Java Source Code

package com.khajenasir.spacedigitizing;
/*from w ww  .j  av  a2s. co m*/
public class GeoHelper 
{
  double sa = 6378137.000000 , sb = 6356752.314245;
  double e = (Math.pow((Math.pow(sa, 2)-Math.pow(sb, 2)), 0.5))*(Math.pow(sa, -1));
  double e2 = (Math.pow((Math.pow(sa, 2)-Math.pow(sb, 2)), 0.5))*(Math.pow(sb, -1));
  double e2cuadrada = Math.pow(e2, 2);
  double c = Math.pow( sa , 2 ) * Math .pow(sb,-1);
  double alpha = ( (sa - sb )) * Math.pow(sa,-1);
  double ablandamiento = 1 * Math.pow(alpha, -1);
  double Huso,S,deltaS,a,epsilon,nu,kk,v,ta, a1,a2,j2,j4,j6,alfa,beta,gama,Bm,x_coordinate,y_coordinate;

  public double[] convert_Geodetic_To_Cartesian(double latitude,double longitude, double altitude)
    {     
      double lat=(double)((latitude*Math.PI)/180);
      double lon=(double)((longitude*Math.PI)/180);

       Huso=Math.ceil((double)(longitude/6))+30; 
       S=( ( Huso * 6 ) - 183 );
       deltaS = lon - ( S * ( (double)(Math.PI  / 180) ) );       
       a = Math.cos(lat) * Math.sin(deltaS);
       epsilon = 0.5 * Math.log( (double)( 1 +  a) / ( 1 - a ) );
       nu = Math.atan( (double)(Math.tan(lat) / Math.cos(deltaS)) ) - lat;
       kk=( 1 + ( e2cuadrada * Math.pow(Math.cos(lat), 2)) );
       v = (double)( (double)(c / Math.pow(kk , 0.5 ))) * 0.9996;
       ta = (double)(( (double)(e2cuadrada / 2) ) * Math.pow(epsilon , 2) * Math.pow( Math.cos(lat) ,  2));
       a1 = Math.sin( (double)2 * lat );
       a2 = (double)a1 * Math.pow( Math.cos(lat) ,  2);
       j2 = lat + ( (double)(a1 / 2) );
       j4 = (double)(( ( 3 * j2 ) + a2 ) / 4);
       j6 = (double)(( ( 5 * j4 ) + ( a2 * Math.pow( Math.cos(lat) , 2) )) / 3);
         alfa =(double)((3* e2cuadrada)/4);       
       beta = (double)((( 5  * Math.pow(alfa , 2)))/3);       
       gama = (double)( (35  * Math.pow(alfa , 3))/27);
       Bm = (double)(0.9996 * c * ( lat - ((double)(alfa * j2)) + ((double)(beta * j4)) - ((double)(gama * j6 ))));
       x_coordinate = (double)(epsilon * v * ( 1 + ((double) (ta / 3) ) ) + 500000);
       y_coordinate = (double)((nu * v * ( 1 + ta )) + Bm);
       if (y_coordinate<0)
       {
          y_coordinate=9999999+y_coordinate;
       }
       
          double[] ret = {x_coordinate, y_coordinate, altitude};
          return ret;
       

    }

}

Java Source Code List