Today, it is accepted that especially metropolitan cities show complex system features that include many interactions and are driven by these interactions. Christaller's mono-centric city hierarchy has become insufficient to explain these urban spatial organizations on its own due to the non-linear relationships between the elements that make up the system in complex systems, and the diversity of journeys and activity areas. Recently, instead of mono-centric city models, which were defined according to the hierarchical relationship between the threshold based on population size and range depending on the maximum distance, polycentric city models expressing the existence of more than one center in an area have been discussed. This study aims to reveal a new spatial pattern approach by evaluating new conceptual and methodological approaches to explain today's urban spatial pattern. For this purpose, in addition to international academic approaches, the Urban Rural Settlement Systems Research (Yer-Sis), which is one of the current examples in defining the settlement system pattern in Turkey, was discussed. In the assessment, it was revealed that in order to define the spatial organization of urban systems, the urban form indicators that determine the size and distribution of urban areas and the relational network based on the flow and cooperation between these areas should be evaluated together and at the end, suggestions were presented in which the theory of central places and the theory of networks were used together to describe urban spatial organization.