The interface of this chart is easy to understand, with an elevator as the main entering source. It is most probably the architecture chart of a library above the ground floor. The chart has different colored circles, each assigned to a specific segment. Some of these involve singular subjective circles that take up the entire space of a sector. On the other hand, some involve multiple structural elements characterized by multiple-sized circles. Also, the chart has arrow-like linking lines that help connect all these shapes and the circulation desk.