/** * 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; }