The "Modern World Basemaps" Map Switcher widget enables users to easily switch between basemaps in the ArcGIS Viewer for Flex application. Basemaps are used to display background imagery and street data. The widget is located in the upper right corner of the web application's user interface. The Map Switcher widget retrieves all the basemap layers and creates a basemap gallery icon displaying all specified layers.
The "Terrain with Labels" basemap is the default. Switching to the "Boundaries without labels" basemap allows users to overlay historical maps without seeing modern place names. Users may choose a different basemap, such as "Streets", which will show modern place names and boundaries.