for (CityNode node : road_network.nodes.values()) {
                XY map_pos = road_network.positions.junction_map_positions.get(node.name);
                XY display_pos = new XY(xoffset + scale * map_pos.x, yoffset + scale * map_pos.y);
                road_network.positions.junction_display_positions.put(node.name, display_pos);
            }