Changing the basemap

底图用于位置参考，并为用户提供叠加或聚合业务图层、执行任务以及可视化地理信息的框架。底图是执行所有后续操作和地图制图的基础，它为地理信息的使用提供了环境和框架。

The Roadway Characteristics Editor provides the functionality to add and change basemap layers.

步骤:

1. Open a web browser and browse to the Roadway Characteristics Editor application.
2. On the Map tab, in the Contents group, click the Basemap button .

   The basemap selector appears.

3. Select any one of the nine basemap layers to add to your map.