@inproceedings{Gray_VIS2015,
  author = {Gray, Cameron C. and Roberts, Jonathan C. and Ritsos, Panagiotis D.},
  title = {Where Can I Go From Here? Drawing Contextual Navigation Maps of the London Underground},
  year = {2015},
  booktitle = {Posters presented at the IEEE Conference on Visualization (VIS), Chicago, IL, USA}
}