Jabarkan Tempo ogé dari Sistim koordinat géografi dalam bahasa sunda

Sistim informasi géografi (Géographic information system, GIS)

Sistim posisi global (Global Positioning System, GPS)

Great-circle distance explains how to find that quantity if one knows the two latitudes and longitudes.

Sistim koordinat Universal Transverse Mercator

Portions of this article are from Jason Harris' "Astroinfo" which is distributed with KStars, a desktop planetarium for Linux/KDE. See