Feb 22, 2009
Dual maps let you display two maps side-by-side for a single location. Use the dual map to combine the features of Google Maps and Microsoft Virtual Earth Maps within one embeddable control. The control also includes the new Google Street View option to view ground level imagery of major US cities. A central divider bar lets you maximize either map. You can optionally display a marker on the map. You can customize the settings for your own needs. The default setting shows the Google Road Map on the left hand map and the Virtual Earth Birdseye view map on the right hand side. Note that the Bird’s eye view is not available for all areas, Hybrid view is used if the Bird’s eye view is unavailable.
[From: Dual Maps : Map Channels, free mapping tools]