if(argc<2)

   {

       std::cerr << "USAGE: gd <input filename.lgf>" << std::endl;

       return 0;

   }

   Coordinates coosvector;

   Graph g;

   CoordinatesMap cm(g);

   Graph::EdgeMap<double> cap(g), map1(g), map2(g), map3(g), map4(g);

   Graph::NodeMap<double> nodedata (g);

   //we create one object to read x coordinates

   //and one to read y coordinate of nodes and write them to cm NodeMap.

   XMap <CoordinatesMap> xreader (cm);

   YMap <CoordinatesMap> yreader (cm);

   //reading in graph and its maps

   std::ifstream is(argv[1]);

   GraphReader<Graph> reader(is, g);

   reader.readNodeMap("coordinates_x", xreader);

   reader.readNodeMap("coordinates_y", yreader);

   reader.readNodeMap("data", nodedata);

   reader.readEdgeMap("cap", cap);

   reader.readEdgeMap("map1", map1);

   reader.readEdgeMap("map2", map2);

   reader.readEdgeMap("map3", map3);

   reader.readEdgeMap("map4", map4);

   reader.run();

   //initializing MapStorage with the read data

   MapStorage ms(g);

   ms.addNodeMap("data",&nodedata);

   ms.addEdgeMap("cap",&cap);

   ms.addEdgeMap("map1",&map1);

   ms.addEdgeMap("map2",&map2);

   ms.addEdgeMap("map3",&map3);

   ms.addEdgeMap("map4",&map4);