Longitude thiab latitude yog ib qho system coordinate uas muaj longitude thiab latitude, ib qho spherical coordinate system uas siv lub sphere ntawm peb degrees ntawm qhov chaw los txhais qhov chaw ntawm lub ntiaj teb, thiab tuaj yeem cim txhua qhov chaw ntawm lub ntiaj teb.
1. Kev faib ntawm longitude: los ntawm prime meridian, 180 degrees sab hnub tuaj hu ua longitude sab hnub tuaj, sawv cev los ntawm "E", thiab 180 degrees sab hnub poob yog longitude sab hnub poob, sawv cev los ntawm "W". 2. Kev faib ntawm latitude: 0 degrees rau equator, 90 degrees rau sab qaum teb thiab sab qab teb, kev nyeem ntawm Sab Qaum Teb thiab sab qab teb yog 90 degrees, sab qaum teb latitude yog qhia los ntawm "N", thiab sab qab teb latitude yog qhia los ntawm "S". 3. Kev sau ntawv yog thawj latitude tom qab longitude, sib cais los ntawm ib lub comma, xws li longitude thiab latitude ntawm Beijing sau ntawv: hauv kev sau ntawv yog 40 degrees sab qaum teb latitude, 116 degrees sab hnub tuaj longitude; Hauv cov lej thiab cov ntawv nws yog: 40 ° N, 116 ° / E.