/**
* Return the intersections, which are the vertices in this graph.
*
* @return The vertices in this graph as GeographicPoints
*/
public Set<GeographicPoint> getVertices() {
Set<GeographicPoint> result = new HashSet<GeographicPoint>();
// TODO: Implement this method in WEEK 2
for (RoadNode node : nodes.values()) {
result.add(node.getLocation());
}
return result;
}
