Searched for: subject:"3D%5C%2Bcity%5C%2Bmodel"
(1 - 13 of 13)
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Labetski, A. (author), van Gerwen, Stefan (author), Tamminga, G.F. (author), Ledoux, H. (author), Stoter, J.E. (author)
CityGML, an OGC standard, is an open data model for virtual 3D city models and includes buildings, roads, terrain, water bodies, etc. While many modules are well-developed (eg buildings, bridges, tunnels), the transportation model is, based on our consultations with various government agencies and municipalities, not sufficient for most...
conference paper 2018
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Vitalis, S. (author), Arroyo Ohori, G.A.K. (author), Stoter, J.E. (author)
3D city models are becoming increasingly important for applications such as evacuation scenarios and energy consumption estimation. For these applications embedding semantic information on geometry is a key factor. The most popular implementation of modern 3D city models is based on the CityGML data model which describes spatial 3D data using a...
conference paper 2018
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Zhou, K. (author), Gorte, B.G.H. (author)
In VHR(very high resolution) aerial images, shadows indicating height information are valuable for validating or detecting changes on an existing 3D city model. In the paper, we propose a novel and full automatic approach for shadow detection from VHR images. Instead of automatic thresholding, the supervised machine learning approach is...
conference paper 2017
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Biljecki, F. (author), Sindram, M. (author)
Building datasets (e.g. footprints in OpenStreetMap and 3D city models) are becoming increasingly available worldwide. However, the thematic (attribute) aspect is not always given attention, as many of such datasets are lacking in completeness of attributes. A prominent attribute of buildings is the year of construction, which is useful for some...
conference paper 2017
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Biljecki, F. (author), Ledoux, H. (author), Du, X. (author), Stoter, J.E. (author), Soon, Kean Huat (author), Khoo, Victor (author)
To be used as input in most simulation and modelling software, 3D city models should be geometrically and topologically valid, and semantically rich. We investigate in this paper what is the quality of currently available CityGML datasets, i.e. we validate the geometry/topology of the 3D primitives (Solid and MultiSurface), and we validate...
conference paper 2016
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Rook, Merwin (author), Biljecki, F. (author), Diakite, A.A. (author)
The lack of semantic information in many 3D city models is a considerable limiting factor in their use, as a lot of applications rely on semantics. Such information is not always available, since it is not collected at all times, it might be lost due to data transformation, or its lack may be caused by non-interoperability in data integration...
conference paper 2016
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Biljecki, F. (author), Ledoux, H. (author), Stoter, J. (author)
This paper describes the analysis of the propagation of positional uncertainty in 3D city models to the uncertainty in the computation of their volumes. Current work related to error propagation in GIS is limited to 2D data and 2D GIS operations, especially of rasters. In this research we have (1) developed two engines, one that generates random...
conference paper 2014
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Biljecki, F. (author), Zhao, J. (author), Stoter, J.E. (author), Ledoux, H. (author)
This review paper discusses the concept of level of detail in 3D city modelling, and is a first step towards a foundation for a standardised definition. As an introduction, a few level of detail specifications, outlooks and approaches are given from the industry. The paper analyses the general uncertainties and shortcomings around the concept of...
conference paper 2013
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Verbree, E. (author), De Vries, M.E. (author), Gorte, B.G.H. (author), Oude Elberink, S. (author), Karimiou, G. (author)
Water run-off modelling applied within urban areas requires an appropriate detailed surface model represented by a raster height grid. Accurate simulations at this scale level have to take into account small but important water barriers and flow channels given by the large-scale map definitions of buildings, street infrastructure, and other...
conference paper 2013
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Sirmacek, B. (author), Lindenbergh, R.C. (author), Menenti, M. (author)
Fusion of 3D airborne laser (LIDAR) data and terrestrial optical imagery can be applied in 3D urban modeling and model up-dating. The most challenging aspect of the fusion procedure is registering the terrestrial optical images on the LIDAR point clouds. In this article, we propose an approach for registering these two different data from...
conference paper 2013
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Alam, N. (author), Coors, V. (author), Zlatanova, S. (author), Van Oosterom, P.J.M. (author)
Due to global warming, green-house effect and various other drawbacks of existing energy sources, renewable energy like Photovoltaic system is being popular for energy production. The result of photovoltaic potentiality analysis depends on data quality and parameters. Shadow rapidly decreases performance of the Photovoltaic system and it always...
conference paper 2012
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Lesparre, J. (author), Gorte, B.G.H. (author)
Aerial laser scan data is widely used to produce 2½D digital elevation models automatically. However, creating full 3D city models from this data is a complex task. A simplified 3D model, like a 2½D model with vertical walls will be easier to produce automatically, especially when the model is not produced to look nice, but just to give...
conference paper 2012
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Rahman, A.A. (author), Hua, T.C. (author), Van Oosterom, P.J.M. (author)
There is no doubt that the cadastral map provides a useful entrance to information in a land parcel based information system. However, such information system could be made more meaningful and useful if it can be extended for multiple usages with multi data layers, and in three-dimensions (3D). Currently, many national mapping and cadastral...
conference paper 2011
Searched for: subject:"3D%5C%2Bcity%5C%2Bmodel"
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