Citygml Modelling for Singapore 3d National Mapping

Soon, Kean Huat; Khoo, Victor

doi:10.5194/isprs-archives-xlii-4-w7-37-2017

Cited by 32 publications

(16 citation statements)

References 3 publications

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“…A Geographic Information System (GIS) based database consisting of building footprints and heights from 2014 from the Singapore Land Authority (Soon and Khoo, ) is used to calculate λ f and λ p . Building blocks, created from the aggregation of joined buildings, were considered as individual obstacles interacting with the flow.…”

Section: Resultsmentioning

confidence: 99%

Application of MORUSES single‐layer urban canopy model in a tropical city: Results from Singapore

Simón-Moral

Dipankar

Roth

et al. 2019

Quart J Royal Meteoro Soc

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A tropical version of the high‐resolution (300 m) UK Met Office forecast model (UM) using the MORUSES urban canopy parametrization (UCP) is adapted for Singapore. High‐resolution urban surface parameters are determined using a methodology based on Voronoi polygons applied to a 3D building database. The model is evaluated for clear sky and calm conditions at the neighbourhood scale by comparing its predictions with two sources of observations: energy balance data from an eddy covariance flux tower located in a low‐rise residential area, and a network of sensors measuring screen‐level temperature across the city. The model is able to reproduce the diurnal cycle of the surface energy balance fluxes. Net radiation is overestimated which likely follows from an underestimation in cloud cover and effective surface albedo. This overestimation partly explains the overestimation of the sensible‐ and latent‐heat fluxes. The higher model sensible‐heat flux is further hypothesised to be related to the overestimation of modelled canyon sensible‐heat flux. Its peak exhibits a 1 h delay, similar to simulated roof and canyon surface temperature. The model captures the diurnal cycle of temperature at a height of 20.5 m above ground and at screen level. A night‐time cold bias of 0.1–1.1 K and an overestimation of the daytime peak value are observed at both heights. These deviations are smaller than those predicted by other UCPs reported in the literature. A simple method to estimate the capability of an urban model to qualitatively distinguish screen‐level temperature differences across different urban morphologies is developed which shows that MORUSES is clearly able to represent the impacts of different neighbourhoods on the thermal environment.

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Section: Resultsmentioning

confidence: 99%

Application of MORUSES single‐layer urban canopy model in a tropical city: Results from Singapore

Simón-Moral

Dipankar

Roth

et al. 2019

Quart J Royal Meteoro Soc

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“…In addition, citybased analysis is being developed in all kinds of application scenarios; most notably, recent efforts have been on traffic noise analysis [35], photovoltaic potentiality analysis [7], urban emission measurements analysis [5] and ubiquitous robot networks management [60]. Official city datasets are increasing, with recent public effort from Turkey [9], Singapore [55] and Germany [71] among all.…”

Section: Related Workmentioning

confidence: 99%

Model-driven engineering city spaces via bidirectional model transformations

Visconti

Tsigkanos

et al. 2021

Softw Syst Model

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Engineering cyber-physical systems inhabiting contemporary urban spatial environments demands software engineering facilities to support design and operation. Tools and approaches in civil engineering and architectural informatics produce artifacts that are geometrical or geographical representations describing physical spaces. The models we consider conform to the CityGML standard; although relying on international standards and accessible in machine-readable formats, such physical space descriptions often lack semantic information that can be used to support analyses. In our context, analysis as commonly understood in software engineering refers to reasoning on properties of an abstracted model—in this case a city design. We support model-based development, firstly by providing a way to derive analyzable models from CityGML descriptions, and secondly, we ensure that changes performed are propagated correctly. Essentially, a digital twin of a city is kept synchronized, in both directions, with the information from the actual city. Specifically, our formal programming technique and accompanying technical framework assure that relevant information added, or changes applied to the domain (resp. analyzable) model are reflected back in the analyzable (resp. domain) model automatically and coherently. The technique developed is rooted in the theory of bidirectional transformations, which guarantees that synchronization between models is consistent and well behaved. Produced models can bootstrap graph-theoretic, spatial or dynamic analyses. We demonstrate that bidirectional transformations can be achieved in practice on real city models.

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“…The cadastral developments in Singapore are accompanied by other GIS and digital twinning initiatives (Soon and Khoo, 2017), such as the Virtual Singapore (a collaborative governmental platform including a nation-wide semantic 3D city model), and discussions on how to integrate these developments are undergoing.…”

Section: Current Status Of 3d Cadastrementioning

confidence: 99%

Considerations for a Contemporary 3d Cadastre for Our Times

Stoter

Biljecki

2019

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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<p><strong>Abstract.</strong> A significant number of studies has been carried out to establish 3D cadastre solutions to improve the registration of multi-level property. Since the inception of research on 3D cadastres (about 20 years ago), the world around us has changed significantly and this also partly changes the context regarding 3D cadastre: technology (e.g. visualisation of 3D information), acquisition techniques and BIM data availability, and policy and organisational structures. This paper aims to explore the implications of these changes on 3D cadastre research with a view to discussing considerations for a contemporary 3D cadastre for our times. The paper draws on social and technical trends, challenges, and gaps around 3D cadastre practices from three jurisdictions: the Australian state of Victoria, the Netherlands, and Singapore. The cases have been selected as examples of well-functioning and highly trusted cadastres and land registries committed to innovation in this area, and whose practitioners and researchers are leading the research in this domain. This set provides a breadth of insight that informs our discussion. However, we acknowledge the limitations of the findings as the research undertaken in these jurisdictions is not complicated by other issues with registration or cadastres as they may occur in other countries.</p>

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Citygml Modelling for Singapore 3d National Mapping

Cited by 32 publications

References 3 publications

Application of MORUSES single‐layer urban canopy model in a tropical city: Results from Singapore

Application of MORUSES single‐layer urban canopy model in a tropical city: Results from Singapore

Model-driven engineering city spaces via bidirectional model transformations

Considerations for a Contemporary 3d Cadastre for Our Times

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