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// Example of using the GeographicLib::CassiniSoldner class
#include <iostream>
#include <exception>
#include <GeographicLib/Geodesic.hpp>
#include <GeographicLib/CassiniSoldner.hpp>
using namespace std;
using namespace GeographicLib;
int main() {
try {
Geodesic geod(Constants::WGS84_a(), Constants::WGS84_f());
// Alternatively: const Geodesic& geod = Geodesic::WGS84();
const double lat0 = 48 + 50/60.0, lon0 = 2 + 20/60.0; // Paris
CassiniSoldner proj(lat0, lon0, geod);
{
// Sample forward calculation
double lat = 50.9, lon = 1.8; // Calais
double x, y;
proj.Forward(lat, lon, x, y);
cout << x << " " << y << "\n";
}
{
// Sample reverse calculation
double x = -38e3, y = 230e3;
double lat, lon;
proj.Reverse(x, y, lat, lon);
cout << lat << " " << lon << "\n";
}
}
catch (const exception& e) {
cerr << "Caught exception: " << e.what() << "\n";
return 1;
}
return 0;
}
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