Well, the actual description of why it was laid out this way was detailed in The Ark Lords fairly well. The blacktop area in the lower part of the shot is MINIMCOM's personal landing area. He also made it large enough to hold other spacecraft and flyers. The other three areas are just the excavations which will eventually hold the commissary, a dormitory and a lecture hall which would also serve as the planet's first movie theater.
Several years later, in Rome's Evolution, we get the sense that the university is expanding rapidly. Rome references a science building and a geology lab and we have to assume they were built farther to the left, expanding the campus. At some point, there will be students so they will need classroom space. We know this because Rome makes specific reference to teaching English to the Ibbrassati and Vuduri to the Essessoni. When you think about it, there are so many people flocking to the planet that in ten or fifteen years, there will be an entire generation of non-mind-connected young people who will have to learn skills, trades, science and so on.
Rei was right in recognizing that Rome's library was only the first of many buildings that would grow to become Deucado's first university. There is a little scene in the trailer that captures that ideal as well: