I've been building a small navigational robot that (so far crudely) maps it's environment on the fly. To help eliminate drift where the robots path bends slightly instead of driving straight, I thought I could simply use an electronic compass module and self-correct using a constant heading from the compass.
It has been suggested to me that this would not work as there is too much interference either from the robot itself of for other 'stuff' inside buildings that would render the compass more trouble than it's worth.
Has anyone had experience with this? Is it possible to overcome this? What could be used in place of a compass to get an accurate heading indoors (GPS won't work indoors / is too expensive).
Many thanks, MrQuan