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Bachert, Carolin (author)In order to limit the global warming to well below 2 degrees Celsius, all sectors have to reduce their greenhouse gas emissions and become more sustainable. This also includes the building sector, which is in Europe responsible for 40% of the total energy consumption (European Commission, 2020). A way to work towards this goal is by retrofitting...master thesis 2023
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Lei, Binyu (author), Janssen, P.H.T. (author), Stoter, J.E. (author), Biljecki, Filip (author)Many challenges to operate digital twins remain, hindering their design and implementation, and are rarely discussed. Furthermore, issues of social and legal nature are often overlooked. We identify the challenges of operating digital twins in the urban context through a bifurcated and multi-dimensional approach: a systematic literature...review 2023
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Cai, Cynthia (author), Meines, Siebren (author), Poon, Chris (author), Powałka, Leon (author), Xia, Yitong (author), YAN, LAN (author)A 3D city model uses three-dimensional geometries to represent and model urban environments, in which the building model is the key feature. With the development of computer and data collection technologies, 3D city models are gaining growing capacities regarding storing rich information. This makes 3D city models more potentially useful than...student report 2022
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FRATZESKOU, CHRISTINA (author)Urban physics is a multi-scale and interdisciplinary field, that combines science and engineering for the study of physical processes in urban areas. Computational Fluid Dynamics (CFD) is considered a powerful tool for the study of these processes. In the context of microscale phenomena these processes refer to the transfer of heat and mass in...master thesis 2022
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TUFAN, ÖZGE (author)3D city models are frequently used to acquire and store energy-related information of buildings to be used in energy applications, such as solar potential analyses and energy demand calculations. In this context, the most common data model is CityGML, which provides an application domain extension called the Energy ADE to store energy-related...master thesis 2022
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Prusti, Maarit (author)The building permit process in the Netherlands is mostly digitalized, however, there are still some issues. A downsize of information, the manual checking from the municipality, and the duration of the process are some of these issues. To overcome these issues information between 3D building design models, so-called Building Information Modeling...master thesis 2022
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Apra, Irène (author)Automated reconstruction of detailed semantic 3D city models is challenging due to the need for high-resolution (HR) and large-scale input datasets, the ambiguous definition of the ensuing model, the intricacy of the processing pipeline, and its costs. Furthermore, existing methods mainly focus on geometry rather than semantics. Detailed...master thesis 2022
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Pađen, I. (author), Garcia Sanchez, C. (author), Ledoux, H. (author)In the computational fluid dynamics simulation workflow, the geometry preparation step is often regarded as a tedious, time-consuming task. Many practitioners consider it one of the main bottlenecks in the simulation process. The more complex the geometry, the longer the necessary work, meaning this issue is amplified for urban flow simulations...journal article 2022
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Tufan, Ö (author), Arroyo Ohori, G.A.K. (author), León Sánchez, C.A. (author), Agugiaro, G. (author), Stoter, J.E. (author)3D city models are frequently used to acquire and store energy-related information of buildings for energy applications. In this context, CityGML is the most common data model, and the Energy ADE, one of its most complex extensions, provides a systematic way of storing detailed energy-related data in XML format. Contrarily, even though...journal article 2022
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Vitalis, S. (author), Arroyo Ohori, G.A.K. (author), Stoter, J.E. (author)Level of Detail (LoD) is a well known concept in 3D city models, used to designate different geometric detail that can be used in different applications. Nevertheless, multi-LoD datasets are hard to maintain and manage because of their intrinsic complexity. Versioning is a solution that aids in the storage and management of big and complex...journal article 2022
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Roy, E.I. (author), Pronk, Maarten (author), Agugiaro, G. (author), Ledoux, H. (author)Data on the number of floors is required for several applications, for instance, energy demand estimation, population estimation, and flood response plans. Despite this, open data on the number of floors is very rare, even when a 3D city model is available. In practice, it is most often inferred with a geometric method: elevation data is used...journal article 2022
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Papageorgiou, Manos (author)Three-dimensional (3D) city models are of great significance and are high in demand. They can be used for various useful applications such as urban planning, visibility analysis and estimating the solar irradiation and energy demand of buildings throughout the day. Nowadays, Light Detection And Ranging (LiDAR) sensors are one of the most...master thesis 2021
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Wu, Jialun (author)Most construction work requires building permit checks. Therefore, to promote sustainable and high-quality urban development, it is necessary to improve the building permit application process and accelerate the digital process of building permit checks. <br/><br/>Many studies about the digitalization of building permitting use the BIM, mainly...master thesis 2021
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Li, Xiaoai (author)With the increasing demand for 3D city models in various applications, providing efficient access to 3D city models on the web has become very important and valuable. However, there is a lack of web services in which users can directly and effectively access the city objects contained in the 3D city models on the web. Another problem with web...master thesis 2021
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Morlighem, Camille (author)Historical 3D city models have been increasingly used for the preservation and communication of the cultural heritage to a wider and more diversified public. In the recent years, they have also been of a growing interest in other domains such as in urbanism or in economy. However, their potential for supporting new use cases has been restricted...master thesis 2021
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Dukai, B. (author), Peters, R.Y. (author), Vitalis, S. (author), van Liempt, J.N.H. (author), Stoter, J.E. (author)Fully automated reconstruction of high-detail building models on a national scale is challenging. It raises a set of problems that are seldom found when processing smaller areas, single cities. Often there is no reference, ground truth available to evaluate the quality of the reconstructed models. Therefore, only relative quality metrics are...journal article 2021
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Garcia Sanchez, C. (author), Vitalis, S. (author), Pađen, I. (author), Stoter, J.E. (author)Climate change and urbanization rates are transforming urban environments, making the use of 3D city models in computational fluid dynamics (CFD) a fundamental ingredient to evaluate urban layouts before construction. However, current geometries used in CFD simulations tend to be built by CFD experts to test specific cases, most of the times...journal article 2021
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Widl, Edmund (author), Agugiaro, G. (author), Peters-Anders, Jan (author)Worldwide, cities are nowadays formulating their own sustainability goals, including ambitious targets related to the generation and consumption of energy. In order to support decision makers in reaching these goals, energy experts typically rely on simulation models of urban energy systems, which provide a cheap and efficient way to analyze...journal article 2021
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Mastorakis, Konstantinos (author)3D city models are continuously becoming more popular among practitioners due to the volume and versatility of information they contain, which makes them suitable to be used in various applications. However, there is no mechanism to allow maintaining them updated at the same pace that cities evolve, or when error correction is necessary,...master thesis 2020
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Kumar, Kavisha (author)A 3D city model is a digital representation of the spatial features in an urban<br/>environment. Buildings, terrain, vegetation, water bodies, etc. all form an integral part of a 3D city model. The possibility to enrich these city models with additional application-specific information, whether new semantics or geometry, further increases their...doctoral thesis 2020