80 #include "CoordinateSystem.h" 
   87     class MapProjection3Parameters;
 
   88     class MapProjectionCoordinates;
 
   89     class GeodeticCoordinates;
 
  117         Eckert6( 
double ellipsoidSemiMajorAxis, 
double ellipsoidFlattening, 
double centralMeridian, 
double falseEasting, 
double falseNorthing );
 
  183       double Ra_Over_Sqrt_Two_Plus_PI;        
 
  184       double Inv_Ra_Over_Sqrt_Two_Plus_PI;    
 
  187       double Eck6_Origin_Long;                
 
  188       double Eck6_False_Easting;
 
  189       double Eck6_False_Northing;
 
  190       double Eck6_Delta_Northing;
 
  191       double Eck6_Max_Easting;
 
  192       double Eck6_Min_Easting;