/**
* Extract the major roads from the road network
*
* @return a connected network of major roads
*/
public Network extractMajorRoads() {
Network majorRoads = new Network();
// go through all nodes
for (Object o : roads.getAllNodes()) {
GeoNode n = (GeoNode) o;
// go through all edges
for (Object p : roads.getEdgesOut(n)) {
sim.field.network.Edge e = (sim.field.network.Edge) p;
// String type = ((MasonGeometry)e.info).getStringAttribute("class");
// save major roads
// if(type.equals("major"))
majorRoads.addEdge(e.from(), e.to(), e.info);
}
}
// merge the major roads into a connected component
NetworkUtilities.attachUnconnectedComponents(majorRoads, roads);
return majorRoads;
}