Re: 430N Alaska
I'm not sure what parts of Alaska aren't covered (very rural/wilderness areas I'm guessing) but any urban area seems to be well covered.
I can say that Canada likewise is very well covered. Any road that existed or was planned in the last two or so years ago can be found in the database. So far no difficulties navigating.
WK2 Overland 4x4, 5.7L Hemi V8 with MDS, Multi-speed Overdrive Automatic with ERS, Quadra-Drive II with Rear ELSD, Off-Road Adventure Group II, Selec-Terrain, Quadra-Lift, Towing Group IV, Advanced Warning & Adaptive Cruise Control, Bright Silver Exterior with Beige Leather Interior, CommandView Sunroof, RHB 430N Sirius satellite radio. Added: Blizzak DM-V1 265/60R18 winter tires.