In the Traveller RPG, a sub-sector of space is a 2D region of space measuring 8 x 10 parsecs. 16 of these make up a sector (32 x 40 parsecs). Each parsec is represented as a hex, which may contain a single star system. Similar to my previous version of WorldGen, I'm generating details on multiple worlds and stars in each system - a system can be a binary or triple system, and each planet can be multiple moons.

So far I've added the framework for creating basic star systems with a few planets - just enough to be able to test the sector maps. The first version of the maps is a REST API for creating a static map, an example of which is shown here.

I'm trying to display a bit more information about the star system than classic Traveller maps do. Information on the number and type of stars is shown. The star size determines it's luminosity - D for a white dwarf, VII for a brown dwarf, VI - Ia for dwarf stars up to super giants etc), the colour it's spectral type (red, orange, yellow, blue etc). The planets in the system are also shown - small or large dots for terrestrial or jovian worlds, lines for asteroid belts etc.

Since there's nothing yet to actually populate any of these worlds with a civilisation, none of the world civilisation data is shown. A summary of this will be displayed for the system's 'Main World' (probably based on population and star port type) when I get that far. How much data is shown will probably depend on the scale the map is displayed at.