dotnet/examples/ManagedCPP/example-AlbersEqualArea.cpp

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using namespace System;
using namespace NETGeographicLib;

int main(array<System::String ^> ^/*args*/)
{
    try {
        const double
            lat1 = 40 + 58/60.0, lat2 = 39 + 56/60.0, // standard parallels
            k1 = 1,                                   // scale
            lon0 = -77 - 45/60.0;                     // Central meridian
        // Set up basic projection
        AlbersEqualArea^ albers = gcnew AlbersEqualArea( Constants::WGS84::MajorRadius,
                                                         Constants::WGS84::Flattening,
                                                         lat1, lat2, k1);
        {
            // Sample conversion from geodetic to Albers Equal Area
            double lat = 39.95, lon = -75.17;    // Philadelphia
            double x, y;
            albers->Forward(lon0, lat, lon, x, y);
            Console::WriteLine( String::Format("X: {0} Y: {1}", x, y ) );
        }
        {
            // Sample conversion from Albers Equal Area grid to geodetic
            double x = 220e3, y = -53e3;
            double lat, lon;
            albers->Reverse(lon0, x, y, lat, lon);
            Console::WriteLine( String::Format("Latitude: {0} Longitude: {1}", lat, lon ) );
        }
    }
    catch (GeographicErr^ e) {
        Console::WriteLine( String::Format( "Caught exception: {0}", e->Message ) );
        return -1;
    }
    return 0;
}