Topological relationships constitute a category of binary relationships between spatial objects. They are based on specific connection properties between geometries, mostly related to having common parts, and disregarding other spatial properties such as the distance and the direction between geometries. There exist many variations of models for representing topological relationships, due to the underlying adopted spatial model and the context of applications. In spatial databases, adopting the vector data model of the Open Geospatial Consortium, topological relationships are evaluated either on the base of the Dimension-Extended 9-Intersection Model (DE9-IM) or the so-called Named Topological Relationships.