Published: Jan 1, 2007 Author(s): Egenhofer, Max J., Nedas, Konstantinos A., Wilmsen, Dominik Abstract: Many real and artificial entities in geographic space, such as transportation networks and trajectories of movement, are typically modeled as lines in geographic information systems. In a similar fashion, people also perceive such objects as lines and communicate about them accordingly as evidence from research read more Metric Details of Topological Line-Line Relations