example-LambertConformalConic.cpp

using namespace System;
using namespace NETGeographicLib;

int main(array<System::String ^> ^/*args*/)
{
    try {
        // Define the Pennsylvania South state coordinate system EPSG:3364
        // http://www.spatialreference.org/ref/epsg/3364/
        const double
            lat1 = 40 + 58/60.0, lat2 = 39 + 56/60.0, // standard parallels
            k1 = 1,                                   // scale
            lat0 = 39 + 20/60.0, lon0 =-77 - 45/60.0, // origin
            fe = 600000, fn = 0;                      // false easting and northing
        // Set up basic projection
        LambertConformalConic^ PASouth = gcnew LambertConformalConic( Constants::WGS84::EquatorialRadius,
                                                                      Constants::WGS84::Flattening,
                                                                      lat1, lat2, k1);
        double x0, y0;
        // Transform origin point
        PASouth->Forward(lon0, lat0, lon0, x0, y0);
        x0 -= fe; y0 -= fn;
        {
            // Sample conversion from geodetic to PASouth grid
            double lat = 39.95, lon = -75.17;    // Philadelphia
            double x, y;
            PASouth->Forward(lon0, lat, lon, x, y);
            x -= x0; y -= y0;
            Console::WriteLine( String::Format("{0} {1}", x, y) );
        }
        {
            // Sample conversion from PASouth grid to geodetic
            double x = 820e3, y = 72e3;
            double lat, lon;
            x += x0; y += y0;
            PASouth->Reverse(lon0, x, y, lat, lon);
            Console::WriteLine( String::Format("{0} {1}", lat, lon) );
        }
    }
    catch (GeographicErr^ e) {
        Console::WriteLine( String::Format("Caught exception: {0}", e->Message) );
        return -1;
    }
    return 0;
}