Lub nroog tau tshaj tawm cov thev naus laus zis tshiab hauv kev tswj hwm kev tsheb nres tsheb, siv kev sib xyaw ua ke geomagnetic nres tsheb sensor thiab cov khoom siv tes kom zoo kom muaj teeb meem kev ua lag luam zoo.
Los ntawm kev txhim kho cov chaw nres tsheb geomagnetic hauv chaw nres tsheb, cov xwm txheej nres tsheb ntawm cov tsheb tuaj yeem sib kis tau rau lub sijhawm tswj hwm lub sijhawm tiag tiag. Nrog Handheld Smart cuab yeej, cov neeg ua haujlwm tuaj yeem nrhiav tau cov ntaub ntawv chaw nres tsheb thiab ua tiav cov ntaub ntawv kuaj thiab them nyiaj tau zoo thiab them nqi.
Qhov ntse no ntse chaw nres tsheb tsis yog txhim kho cov nqi nres tsheb thiab kev sib cav sib ceg, nqa cov pej xeem ua kom muaj zog ntau dua thiab txhaj rau cov kev tswj hwm tshiab rau hauv nroog tswj kev tsheb.