computer science, spatial networks have been also studied intensively during the 1970s in quantitative geography. Objects of studies in geography are inter alia locations, activities and flows of individuals, but also networks evolving in time and space. Most of the important problems such as the location of nodes of a network, the evolution of transportation networks and their interaction with population and activity density are addressed in these earlier studies. On the other side, many important points still remain unclear, partly because at that time datasets of large networks and larger computer capabilities were lacking. Recently, spatial networks have been the subject of studies in Statistics, to connect probabilities and stochastic processes with networks in the real world. See also Hyperbolic geometric graph Spatial network analysis software Cascading failure Complex network Planar graphs Percolation theory Modularity (networks) Random graphs Topological graph theory Small-world network Chemical graph Interdependent networks References Architectural theory Environmental design Environmental psychology Application-specific graphs Graph theory