convertCoordinates.cpp

This is an example of how to convert a coordinate from a projection to another

/************************************************************************************
TerraLib - a library for developing GIS applications.
Copyright © 2001-2004 INPE and Tecgraf/PUC-Rio.

This code is part of the TerraLib library.
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*************************************************************************************/
/* 
        This file showns an example of how to convert coordinates from a projection to another.

        Author: Lubia Vinhas  
*/

#include "../../src/terralib/kernel/TeProjection.h"
#include <iostream>

int main()
{
        TeDatum dSAD69 = TeDatumFactory::make("SAD69");         // SAD69 Spheroid

        TeDatum dWGS84 = TeDatumFactory::make("WGS84");         // WGS84 Spheroid

        TeUtm* pUTM = new TeUtm(dSAD69,-45.0*TeCDR);            // Origin latitude of -45.0
                                                                                                                // TeCDR means "Convert to Degrees from Radians"

        TePolyconic* pPolyconic = new TePolyconic(dWGS84,-45.0*TeCDR);  // Origin latitude of -45.0
                                                                                                                                                                                                                                                                                        // TeCDR means "Converte Degrees from Radians"
        TeCoord2D pt1(340033.47, 7391306.21);           // Original coordinate in UTM

        // Conversion from the UTM to the Polyconic projection
        pUTM->setDestinationProjection(pPolyconic);

        TeCoord2D ll = pUTM->PC2LL(pt1);                        // Convert to Lat Long
        TeCoord2D pt2 = pPolyconic->LL2PC(ll);          // Convert to output projection

        printf("UTM -> Polyconic \n");
        printf("(%.4f, %.4f) -> ",pt1.x(), pt1.y());
        printf("(%.4f, %.4f) \n",pt2.x(), pt2.y());

        // Conversion from the Polyconic to the UTM projection
        pPolyconic->setDestinationProjection(pUTM);
        ll = pPolyconic->PC2LL(pt2);
        pt1 = pUTM->LL2PC(ll);

        printf("\nPolyconic -> UTM \n");
        printf("(%.4f, %.4f) -> ",pt2.x(), pt2.y());
        printf("(%.4f, %.4f) \n",pt1.x(), pt1.y());

        cout << "\nPress Enter\n" ;
        cout.flush();
        getchar();
        return 0;
}

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