Muchidzidzo cheTarachisi, (Geography), nyika yakatarwa nemhando mbiri dzemitsetse. Kune mitsetse yakatarwa yakati sambamba neMutsazanisi inonzi latitude; kune mitsetse inotenderera nyika ichibata kuNorth pole neSouth pole inonzi longitude. Mitsetse iyi inoshevedzwa nenhamba dzakarongeka. Nhamba dzemitsetse yerumbariro dzinoveregwa dzichibva paMutsazanisi dzichienda kuNorth pole neSouth pole. Nhamba dzemitsetse yehunhungo dzinoverengwa dzichibva pamutsetse weGreenwich Meridian zvichienda kuMavirira nekuMabvazuva. Greenwich Meridian mutsetse welongitude unopfuura pedyo neRoyal Observatory, Greenwich, kuUnited Kingdom. Naizvozvo nzvimbo dzose dziri panyika dzine nhamba inotaura kuti nzvimbo iri papi mudandemutande remitsetse iyoyi. Ruzivo urwu ndirwo rwakashandiswa muhumhizha hweGPS, Geographical Position System chinova chombo chinobatsira kutaura kuti tiri papi uye kupa rudzivo (direction) rwenzvimbo yatinoda kuenda. Chirongwa chekutarwa kwenyika nenzira yatsananguwa iyi chinodanwa kunzi Geographic Coordinate System - kuChiShona tochiti Dandira reMapangana eTarachisi kana kuti Dandira reMbariro neNhungo dzeTaranyika. Zita reChiShona iri rakaumbwa nenzira inotevera: Mapangana (Coordinates) zvinoreva nhamba dzakarongeka dzinotevera mitaro yakatarwa dzinobatsira kuronda pane nzvimbo iri kutsvakwa. Tarachisi (Geography) - iri izwi riri kubva kumazwi ari kuEnglish anoti: geo rinoreva nyika (earth), uye graph rinoreva mutaro.