Egels Y, 1991, "TRAPU: a tool for data capture and visualisation of the urban fabric" Environment and Planning B: Planning and Design 18(1) 19 – 24
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TRAPU: a tool for data capture and visualisation of the urban fabric
Received 28 September 1989
Abstract. The TRAPU system developed by the Institut Géographique National is a computer tool for the digitising and modelling of three-dimensional urban forms using photogrammetnc techniques. The data structures employed allow the creation of convex polyhedra, laminae and lines in space. Topography of the ground surface may be represented by triangulated surfaces. Perspective and orthographic views can be created. Data can be exchanged with other CAD systems. Applications of the system so far have been mainly for visualising architectural projects in context, and for studying the impact of new roads and large urban developments.
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