Hex Number
An Astrographic Hex is a visual device representing the center point of a star system or set of polystellar star systems used for travelling between mainworlds or other point of interest.
- An astrographic hex is located within an idealized yet hypothetical set of 3D coordinate cubes radiating out from the Encyclopediopolis. Encyclopediopolus represents the coordinate location of x: 0, y: 0, and z: 0.
- Charted Space (Traveller) astrographic maps use grids of hexagons, usually referred to as astrograhic hexes or simply "hexes." Each hex is assigned a number in a sequence.
- This number can vary, depending of the type of map being used.
- The purpose of the hex location number is to enable players and Referees/GMs to quickly locate star systems on a map.
Description (Specifications)
No information yet available.
Hexes
Each hex is 3.26 light years across, from each flat edge to the opposite flat edge. Starships can Jump the number of hexes equivalent to the Jump Drive rating of the ship (Jump-1, Jump-2, etc).
Subsector Maps
A subsector is an area of space. A subsector map consists of eight columns of 10 hexes. The first column (which begins at the top left corner of the map) is numbered 0101, 0102, 0103, and so on, down the bottom of the map, with the last hex in the 01 column numbered as 0110. This format is repeated across all eight columns, beginning again at the top of the map. Thus the first hex in the next column is numbered 0201. The last hex of the subsector map (in the bottom right corner of the map) is numbered 0810.
By convention, when a single subsector map is shown, it is numbered using the system described above.
Sector Maps
A sector map is composed of 16 subsectors, arranged as four rows of four subsectors. Sector hex location numbers differ slightly from the system used for subsectors, in that the numbers continue beyond the "end" of each subsector in a sequential manner. Thus, the first hex of a sector map (located at the top left corner of the map) is still numbered 0101; however, the 01 column continues to be sequentially numbered into the subsector below. Thus, the first hex in the 01 column of the subsector below the top left subsector in the sector map is numbered 0111, the next hex is numbered 0112, then 0113, and so on. Each column of hexes in a sector map begins at xx01 and ends at xx40.
This extension of the numbering system also applies to the column numbers. Instead of each subsector having columns of hexes numbered from 01 to 08, the first column of the second subsector in the first row of the sector is numbered 09, the next 10, then 11, up to 32.
This means that the first hex in a sector map is nmbered 0101 (at the top left corner of the map) and the last hex is numbered 3240 (at the bottom right corner of the map).
History & Background (Dossier)
No information yet available.
Current Hex Numbering Convention
Many current supplements for Traveller (including those produced for use with GURPS Traveller) do not number hexes if a star system is not present at a hex location. Only those hexes that contain a star system are numbered, and most supplements use the sector hex location number system, even when showing only a single subsector of the sector.
References & Contributors (Sources)
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