April 15, 2018

A Unified Clustering Approach for Identifying Functional Zones in Suburban and Urban Areas

  • Cao J.
  • He R.
  • Yang J.
  • Zhang Y.

It is well known that a modern city comprises multiple functional zones such as business, entertainment and shopping areas. It is also well established that identifying functional zones can effectively assist in understanding human mobility behavior and planning urban development. Less is known about suburban functional zones. In this paper we propose a unified approach that successfully identifies functional zones in both suburban and urban areas. Our approach is driven by POIs (points of interest) without relying on human movement trajectories. We offer a two-stage clustering algorithm, for which the key is computing geolocation clusters based on the density and physical location of POIs. Often in the literature geolocation clusters are POI independent, e.g. derived from existing road networks or cell coverage map. In contrast, our geoclusters can be of varying sizes, arbitrary shapes and different POI densities. Furthermore, we observe that a sizable fraction of our geoclusters have a small number of dominating functionalities. This illustrates that suburban functional zones exist and makes it possible to further group geoclusters by their functional characteristics into meaningful functional zones. To validate our approach, we carry out detailed studies of a suburban area in New Jersey and the Manhattan area of New York City. We share our insights from these studies.

View Original Article

Recent Publications

January 01, 2019

Friendly, appealing or both? Characterising user experience in sponsored search landing pages

  • Bron M.
  • Chute M.
  • Evans H.
  • Lalmas M.
  • Redi M.
  • Silvestri F.

© 2017 International World Wide Web Conference Committee (IW3C2), published under Creative Commons CC BY 4.0 License. Many of today's websites have recognised the importance of mobile friendly pages to keep users engaged and to provide a satisfying user experience. However, next to the experience provided by the sites themselves, ...

January 01, 2019

Analyzing uber's ride-sharing economy

  • Aiello L.
  • Djuric N.
  • Grbovic M.
  • Kooti F.
  • Lerman K.
  • Radosavljevic V.

© 2017 International World Wide Web Conference Committee (IW3C2), published under Creative Commons CC BY 4.0 License. Uber is a popular ride-sharing application that matches people who need a ride (or riders) with drivers who are willing to provide it using their personal vehicles. Despite its growing popularity, there exist ...

January 01, 2019

The paradigm-shift of social spambots: Evidence, theories, and tools for the arms race

  • Cresci S.
  • Petrocchi M.
  • Pietro R.
  • Spognardi A.
  • Tesconi M.

© 2017 International World Wide Web Conference Committee (IW3C2), published under Creative Commons CC BY 4.0 License. Recent studies in social media spam and automation provide anecdotal argumentation of the rise of a new generation of spambots, so-called social spambots. Here, for the first time, we extensively study this novel ...