Map collection ETH, Zurich
Geologically painted reliefs have a long tradition, since in mountainous regions the geology is often very complicated. The three-dimensional models facilitate the understanding of spatial and temporal interrelations of different geological formations. However, beside the edges of the model, it is not possible to give a real 3D-image of the substratum; it remains a 2.5D representation. Only if the surface is transparent, underground features may be illustrated. So it is for example possible to show groundwater flows.
Models of waterbodies allow studying different cases. They help understanding the morphologically dynamic processes of rivers to provide sustainable flood protection. It is possible to gather information about the behaviour of water in case of storm or flood and to understand internal flow features around bridge piers, preventing bridge collapses initiated by scour during a flood event. The consequences of hydraulic engineering projects on the flowing pattern can be studied.