To get those 'rought' dimensions, I used some videos with peoples as reference. Firstly I measured how many 'peoples' could fit from top to bottom, and from the right to the left. I assumed the the average height of one person was 1,70m.
NumberOfPeoples * 1,70 = height or width
For the starship and skydock, I used the RLV (height previously calculated) as a reference.
this measuring could be used by like an artist or graphic designer to create maybe new structures or create new shemes for the old ones?
I don't think so. The numbers of maximum structures and how they function are all hardcoded inside the executable