Galactic coordinates
From Wookieepedia, the Star Wars wiki.
Galactic coordinates refer to the location of star systems on the galactic plane. Every system is located by its XYZ coordinates; X measures the system's "east-west" location, Y measures its "north-south" location, and Z measures its distance above or below the galactic plane. The system is known as the Coruscant coordinates system as it is centered on Coruscant rather than the actual galactic center - Coruscant is dignified with XYZ coordinates of 0,0,0 (Triple Zero in military speak). In the Coruscant system, a parsec is 3.26 light years, with fifteen parsecs corresponding to one unit on the coordinates scale. A negative number for X, Y or Z coordinates indicate that the star system is west of, south of, or below Coruscant's position.[1]
All starship navicomputers contain XYZ coordinates for billions of star systems.[1]
Another example is Kiribi, located at (099,099,011).
