> even if you were 99.9% accurate, that 0.1% inaccuracy is compounded over time Not really, with SLAM there are various algorithms to keep inaccuracy in check.

> even if you were 99.9% accurate, that 0.1% inaccuracy is compounded over time Not really, with SLAM there are various algorithms to keep inaccuracy in check. Basically it works by a feedback loop of guessing an estimate for position and then updating it using landmarks.