By Martin Breunig, Mulhim Al-Doori, Edgar Butwilowski, Paul V. Kuper, Joachim Benner, Karl Heinz Haefele
Nowadays 3D Geoinformation is required for plenty of making plans and research projects. for instance, 3D urban and infrastructure versions are paving the way in which for advanced environmental and noise analyzes. 3D geological sub-surface versions are wanted for reservoir exploration within the oil-, gas-, and geothermal undefined. therefore 3D Geoinformation brings jointly researchers and practitioners from varied fields similar to the geo-sciences, civil engineering, 3D urban modeling, 3D geological and geophysical modeling, and, final yet now not least, computing device technological know-how. the varied demanding situations of 3D Geoinformation technological know-how crisis new methods and the improvement of criteria for above- and under-ground 3D modeling, effective 3D info administration, visualization and research. eventually, the mixing of alternative 3D methods and knowledge types is obvious as essentially the most vital demanding situations to be solved.
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Additional info for 3D Geoinformation Science: The Selected Papers of the 3D GeoInfo 2014
For non-rectangular elements, additionally a 2D proﬁle should be given to describe the outer contour of the door or window. If only the parameters are given, the resulting geometry has to be calculated. Within the generalization process, the best solution to control the geometric complexity of these elements is to interpret the parameters, if available. Otherwise the geometry will be approximated by a projection of the opening element on the corresponding surface of the building element. Unlike IFC, the opening elements in CityGML do not represent an additional element, but are already subtracted from the corresponding boundary surface.
MSc thesis, University of Applied Science Karlsruhe, Research Center Karlsruhe Nagel C, Häfele K-H (2007) Generierung von 3D-Stadtmodellen auf basis des IFC-Gebäudemodells. Entwicklerforum Geoinformatinstechnik 2007 Sester M (2007) 3D visualization and generalization. In: Proceedings of the 51st photogrammetric week, Stuttgart, 3–7 Sept 2007, pp 285–295 Thakura A, Banerjeea AG, Gupta SK (2009) A survey of CAD model simpliﬁcation techniques for physics-based simulation applications. Comput Aided Des 41(2):65–80 Thiemann F, Sester M (2004) Segmentation of buildings for 3D-generalisation.
In this pass, net area and the quantity of overlapping area, with corresponding surfaces of the ExtrusionBaseMode are checked to assign the correct type. As an optional calculation step, the generation of roof overhangs can be initiated. The relevant geometry will be derived by a geometrical comparison of IFC roof elements with the created CityGML RoofSurface. By a projection of the CityGML RoofSurface on the IFC roof geometries, the overlapping parts are identiﬁed and separated by a geometric subtraction.
3D Geoinformation Science: The Selected Papers of the 3D GeoInfo 2014 by Martin Breunig, Mulhim Al-Doori, Edgar Butwilowski, Paul V. Kuper, Joachim Benner, Karl Heinz Haefele