This dataset is a network of London underground transportation system, where each vertex represents a tube station, and two tube stations are considered connected if they are adjacent on some tube line. The spatial coordinates of tube stations are from Wikipedia. The network information is derived from the data hosted by Mason Porter, as part of the paper cited below. Data file:

• london_underground.zip

If you use this data, please cite the following papers:

• Detecting Core-Periphery Structure in Spatial Networks.
  Junteng Jia and Austin R. Benson.
  Proceedings of the ACM International Conference on Web Search and Data Mining (WSDM), 2019. [bibtex]
• Core-Periphery Structure in Networks.
  M. Puck Rombach, Mason A. Porter, James H. Fowler, and Peter J. Mucha.
  SIAM Journal on Applied Mathematics, 2014. [bibtex]