You may not:
8.1. access or use the Service or any Content through any technology or means other than those provided in the Service, or through other explicitly authorized means Google may designate;
theres also a few places that say if Google doesn't approve of your use then it can terminate you usage without notice.
Streetdeck 2 uses Google map's cache data for the maps
navigation engine built off of the decarta sdk and uses navteq data. The only google map data is the satellite images that are overlaid.
software, and that software needs to support satellite overlays).