examples/example-Ellipsoid.cpp

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// Example of using the GeographicLib::Ellipsoid class

#include <iostream>
#include <exception>
#include <GeographicLib/Ellipsoid.hpp>

using namespace std;
using namespace GeographicLib;

int main() {
  try {
    Ellipsoid wgs84(Constants::WGS84_a(), Constants::WGS84_f());
    // Alternatively: const Ellipsoid& wgs84 = Ellipsoid::WGS84();
    cout << "The latitude half way between the equator and the pole is "
         << wgs84.InverseRectifyingLatitude(45) << "\n";
    cout << "Half the area of the ellipsoid lies between latitudes +/- "
         << wgs84.InverseAuthalicLatitude(30) << "\n";
    cout << "The northernmost edge of a square Mercator map is at latitude "
         << wgs84.InverseIsometricLatitude(180) << "\n";
  }
  catch (const exception& e) {
    cerr << "Caught exception: " << e.what() << "\n";
    return 1;
  }
}