Blue worlds have liquid surface water.
Grey worlds lack surface liquid water.
Purple worlds have non-water surface liquids.
White caps indicate surface water ice and no significant surface water.
Multiple dots denote an asteroid belt main-world.
Starburst is a star system with no significant bodies or asteroid belts (typically bright stars).
A black dot on the upper right side of the hex denotes the presence of local gas giants.
Most system locations were "flattened" from real-life astrography; some (the ones without names) were hand-generated and handwaved to represent worlds orbiting hypothetical dim stars we haven't detected yet as per 2015.
Dataset was similar to what I used to generate the Outer Veil map, but I did make significant changes to this map.