A three-dimensional network-based space–time prism

@article{Neutens2008ATN,
  title={A three-dimensional network-based space–time prism},
  author={Tijs Neutens and Nico Van de Weghe and Frank Witlox and Philippe De Maeyer},
  journal={Journal of Geographical Systems},
  year={2008},
  volume={10},
  pages={89-107}
}
Time-geographic concepts are effective tools for the geovisualization of human activity patterns and to assess individual accessibility. In their traditional form, however, time-geographic concepts assume uniform travel velocities in an isotropic and homogeneous space. Because transportation systems confine travellers to links of road and rail networks with time-varying flows, these premises are typically unsatisfied in real-world situations. This paper provides an innovative approach to… 
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