MERIDIANI ZAMIN

MERIDIANI ZAMIN (az lot. meridianus— nisfiruzi), doirai kaloni kurai Zaminro guyand, ki tasavvuran az dar du qutb meguzarad. Meridianro dar sathi Zamni ba miqdori ziyod guzaronidan mumkin ast, vale odatan 360-toi onro asosi meshumorand. Meridiani Zamin qismi tarkibii shabakai koordinatahoi geografi meboshad. Meridiani avvalin (yo sifri), ki az boloi rasadkhonai Grinvich (London) meguzarad, kurai Zaminro ba nimkurahoi sharqi va garbi taqsim mekunad. Arahoi geografi qad-qadi Meridiani Zamin ba hisob girifta meshavand. Agar nuqta dar tarafi shimoli ekvator voqe gardida boshad, onro arzi shimoli va agar dar tarafi janubi bo joygir buda boshad, arzi janubi menomand. Darozii purrai Meridiani Zamin (davri Zamin) baroi ellipsoidi Krasovskiy ba 40008, 550 km barobar ast.