I know ^.^ Part of what you are trying to do is why I came up with the idea of the Lida. Basically, if man takes to the stars there is no measurement that is really any good for us to use and comprehend so in my story universe I had to come up with something to make sense. I also think the 3d maps that we use irl and the Star Trek galaxy map style is lousy and/or hard to understand... to top that off I am off and on planning on a game similar to yours, more like gal-civ but much much larger... All these combined to the need for this new unit and with it came a much better way to map the galaxy...actually any galaxy, but that's not important.
Of course, lots of people who are supposedly interested in science and such seem to disagree that we need new units for things because the current units break down with astronomical scales, but if I were deterred by people who said I was wrong, I'd never get anywhere or be shown to be right so much ^.^
Anyways... your welcome for this galactic mapping method ^.^