Searched for: department:"Urbanism"
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document
Biljecki, F. (author)
A set of 12436 papers published in 20 GIScience journals in the period 2000–2014 were analysed to extract publication patterns and trends. This comprehensive scientometric study focuses on multiple aspects: output volume, citations, national output and efficiency (output adjusted with econometric indicators), collaboration, altmetrics (Altmetric...
journal article 2016
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Biljecki, F. (author), Stoter, J.E. (author), Ledoux, H. (author), Zlatanova, S. (author), Coltekin, A. (author)
In the last decades, 3D city models appear to have been predominantly used for visualisation; however, today they are being increasingly employed in a number of domains and for a large range of tasks beyond visualisation. In this paper, we seek to understand and document the state of the art regarding the utilisation of 3D city models across...
journal article 2015
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Peters, R. (author), Ledoux, H. (author), Biljecki, F. (author)
Visibility analysis is an important application of 3D GIS data. Current approaches require 3D city models that are often derived from detailed aerial point clouds. We present an approach to visibility analysis that does not require a city model but works directly on the point cloud. Our approach is based on the medial axis transform, which...
conference paper 2015
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Biljecki, F. (author), Arroyo Ohori, K. (author)
We investigate the automatic conversion between two substantially different formats used in 3D city models: the ubiquitous but semantically poor Wavefront OBJ and the semantically rich but less used OGC standard CityGML. We elaborate on their differences and on the challenges involved in their conversion, such as the inference of semantics in an...
conference paper 2015
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Aarsen, R. (author), Janssen, M. (author), Ramkisoen, M. (author), Biljecki, F. (author), Quak, W. (author), Verbree, E. (author)
In case of a calamity in the Netherlands - e.g. a dike breach - parts of the nationwide electric network can fall out. In these occasions it would be useful if decentralised energy sources of the Smart Grid would contribute to balance out the fluctuations of the energy network. Decentralised energy sources include: solar energy, wind energy,...
conference paper 2015
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Arroyo Ohori, G.A.K. (author), Ledoux, H. (author), Biljecki, F. (author), Stoter, J.E. (author)
The various levels of detail (LODs) of a 3D city model are often stored independently, without links between the representations of the same object, causing inconsistencies, as well as update and maintenance problems. One solution to this problem is to model the LOD as an extra geometric dimension perpendicular to the three spatial ones,...
journal article 2015
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Boeters, R (author), Arroyo Ohori, G.A.K. (author), Biljecki, F. (author), Zlatanova, S. (author)
journal article 2015
document
Biljecki, F. (author), Ledoux, H. (author), Stoter, J.E. (author)
Cities are increasingly adopting 3D city models for 3D visualisation, computing solar panel potential of roofs, and other applications. In a similar way to traditional maps, 3D models are an abstraction of the real world: certain elements are simplifi ed or omitted. The amount of detail that is captured in a 3D model, both in terms of geometry...
journal article 2014
document
Biljecki, F. (author), Ledoux, H. (author), Stoter, J.E. (author)
The CityGML standard enables the modelling of some topological relationships, and the representation in multiple levels of detail (LODs). However, both concepts are rarely utilised in reality. In this paper we investigate the linking of corresponding geometric features across multiple representations. We describe the possible topological cases,...
conference paper 2014
document
Biljecki, F. (author), Ledoux, H. (author), Stoter, J.E. (author)
The geometry of the LOD1 block model of CityGML may be represented in a multitude of valid variants, e.g. it may represent individual buildings or aggregated blocks. The geometric representations within each of these, such as the reference of the footprint of a building, are not standardised in CityGML and are not informed in the metadata. The...
conference paper 2014
Searched for: department:"Urbanism"
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