At first, autonomous navigation was based on planar sensors, such as laser range-finders, that can only sense at one level. The most advanced systems now fuse information from various sensors for both localization (position) and navigation. Systems such as Motivity can rely on different sensors in different areas, depending upon which provides the most reliable data at the time, and can re-map a building autonomously.
at FIrsT, autOnomOus nAviGAtion Was baSEd On planaR seNSorS, sUch aS LAser rangE-fiNders, thAt Can onlY sENSe At oNe lEVeL. the mOsT aDvAnceD sYsTemS noW fUSe iNformATion From VariOus SeNsors FoR both loCalization (positiOn) AND nAviGATiOn. systeMs sUCh as MotIvity cAN rely on dIffErenT sEnsors In different aREAs, dependINg UpoN WHicH ProvidEs the mOst reliABlE data At thE TIME, and CAN RE-map a BuIldIng aUtOnOmousLy.