The fundamental idea of odometry is the integration of incremental motion information
over time, which leads inevitably to the accumulation of errors. Particularly the
accumulation of orientation errors will cause large position errors, which increase
proportionally with the distance traveled by the robot. Nevertheless, it is widely accepted
that odometry is a very important part of a robot navigation system and that navigation
tasks will be simplified if odometric accuracy can be improved. Below are some of the
reasons why odometry is used for mobile robots: