I did statistic analysis.

1.Average path length and Betweeness Centrality
Average path length is about 3. Users can go to the building they want in 3 buildings, no matter where they are.

2.Closeness Centrality
:how many steps(buildings) are required for a particular actor to access every other actor in the network

3.Degree distribution

4.Clustering coefficient
There is no much triangle in this network.

*Link