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Urban and Regional Data Management
One of the simplest methods to construct a 3D city model is to extrude building footprints, to obtain "block-shaped" buildings. While the method is well-known and easy to implement, if the topological relationships between the footprints are not taken into account, the resulting city models will not necessarily be topologically consistent. As a result, the model will be of little use for most applications, besides visualisation that is. In this paper, we present a new extrusion algorithm todoi:10.1201/9780203869352.ch4 fatcat:yo4bzbbhonej3p7wnih56m3giy