Starfield
"[The] third dimension can be added fairly painlessly. . . ."
— Bob McWilliams, "3D Space," White Dwarf #73
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Colonies Sphere — Districts
Detail of threedimensional game space of the Earth Colonies Sphere (illustration by Redmond Simonsen from StarForce: Alpha Centauri)

District is the nomenclature developed by the Prometheus Foundation for a standard astrographic region defined as a rectangular cube measuring eight parsecs (spintrailward) by ten parsecs (corerimward) by nine parsecs (updownward) and divided into 720 volumes of one cubic parsec each called "hexprisms." The Colonies Sphere is not actually a sphere but rather a rectangular volume of 64 Districts measuring 36 parsecs (updownward) by 32 parsecs (spintrailward) by 40 parsecs (corerimward). Each of the 64 Districts is identified by a distinct name and location within the overall volume.
A "Disc" is the set of planes corresponding to the nine corerimward / spintrailward "discs" along each zenithnadir ("zz") coordinate of a District, giving a rectangular volume measuring 32 parsecs by 40 parsecs by nine parsecs and comprised of the "discs" of sixteen Districts. There are four Discs in the Colonies Sphere, identified as Discs 1 through 4, moving from upward to downward.
A "Ring" is the set of planes corresponding to the ten spintrailward / updownward "rings" along each corerim ("yy") coordinate of a District, giving a rectangular volume measuring 32 parsecs by ten parsecs by 36 parsecs and comprised of the "rings" of sixteen Districts. There are four Rings in the Colonies Sphere, identified as Rings 1 through 4, moving from coreward to rimward.
A "Spoke" is the set of planes corresponding to the eight corespinward / updownard "spokes" along each spintrailing ("xx") coordinate of a District, giving a rectangular volume measuring eight parsecs by 40 parsecs by 36 parsecs and comprised of the "spokes" of sixteen Districts. There are four Spokes in the Colonies Sphere, identified as Spokes 1 through 4, moving from spinward to trailwardward.
Districts shown in grey shading have yet to be charted by the Commonwealth Scout Service, the Discovery Service of the Abrahamic Synod or the Vanguard of the Empire of Atzlán.
Disc 1
Ring 
Spoke 1 
Spoke 2 
Spoke 3 
Spoke 4 
1 
Atlantis 
Ehime 
Auriga 
Susanowo 
2 
Hyrcania 
Ursa Major 
Capella 
Cassiopeia 
3 
Quetzalcoatl 
Boötes 
Cepheus 
Shangti 
4 
Sarasvati 
Mercia 
Hibakusa 
Chalputepec 
Disc 2
Ring 
Spoke 1 
Spoke 2 
Spoke 3 
Spoke 4 
1 
Ōkuninushi 
Castor 
Brahma 
Lorelei 
2 
Denebola 
Pegasus 

3 
Arcturus 
Hejaz 

4 
Isauria 
Aquila 
Zarathustra 
Disc 3
Ring 
Spoke 1 
Spoke 2 
Spoke 3 
Spoke 4 
1 
Muntu 
Santa Fe 
Orion 
Ptah 
2 
Alpha Crucis 
Theridia 

3 
Kiangsi 
Vishnu 

4 
Gilgamesh 
Wanganui 
Cinnabar 
Disc 4
Ring 
Spoke 1 
Spoke 2 
Spoke 3 
Spoke 4 
1 
Siva 
Oceania 
Pacifica 
Jaxartes 
2 
Tanagra 
Draconis 
Alpha Hydri 
Phoenix 
3 
Theta Centauri 
Southern Triangle 
Tunghai 
Amaterasu 
4 
Missisquoi 
Masada 
Xanadu 
Europa 
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