This illustrates the Deadreackoning part of Trimble Lassen GPS+DR that I have integrated into my power control design.
It is recorded under toughest possible conditions. It starts with a 90 degree turn into a thunnel from standstill followed by a long left and a long right. Then a 180 to the right. Interesting to see that the thunnel on the map is a little off to make the map look nicer...