A road map is a visualization of geographic information. 道路图是可视化的地理信息。
A road map is a two-dimensional object that contains points, lines, and polygons that can represent cities, roads, and political boundaries such as states or provinces. 道路图是一种二维对象，其中包含点，线，多边形以代表城市，道路，及省或州的行政区划边界。
Is there a place where a road map is available near at hand? 附近有没有什么地方能买到本市的街道图。
