std::map<double,double> gTrack;
	std::fstream track;
	track.open("groundtrack.txt",std::ios::in);
	if(track.is_open())
	{
		std::string line;
		double tlat, tlon;
		while(std::getline(track,line))
		{
			sscanf(line.c_str(),"%lf%lf",&tlon,&tlat);
			gTrack.insert(std::pair<double,double>(tlon,tlat));
		}
	}
	track.close();