michinyon:
Those gadgets are useful for orientation, which is important for aircraft but not very useful in an automobile, unless you are interests in observing the vehicle rolling over.You'd be better off looking at GPS.
I already built a GPS system and it is working fine, we want to work on the INS system in the event that GPS is unavailable (like in a tunnel). I am just looking for any good advice, code, or resources on estimating position with an IMU.