3d City Models for Supporting Simulations in City Densifications

Harrie, Lars; Kanters, Jouri; Mattisson, Kristoffer; Nezval, Peter; Olsson, Per-Ola; Pantazatou, Karolina; Kong, Gefei; Fan, Hongchao

doi:10.5194/isprs-archives-xlvi-4-w4-2021-73-2021

Cited by 4 publications

(4 citation statements)

References 9 publications

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“…For example, it should support climate and environmental simulations, such as noise [13], urban energy [14,15], daylight [16], and wind comfort simulations [17]. In addition to supporting input to the simulations, the 3D city models should facilitate visualisation of the simulation results together with the city model data [18,19].…”

Section: Applications Of 3d City Modelsmentioning

confidence: 99%

Future Swedish 3D City Models—Specifications, Test Data, and Evaluation

Uggla¹,

Olsson

Abdi

et al. 2023

IJGI

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Three-dimensional city models are increasingly being used for analyses and simulations. To enable such applications, it is necessary to standardise semantically richer city models and, in some cases, to connect the models with external data sources. In this study, we describe the development of a new Swedish specification for 3D city models, denoted as 3CIM, which is a joint effort between the three largest cities in Sweden—Stockholm, Gothenburg, and Malmö. Technically, 3CIM is an extension of the OGC standard CityGML 2.0, implemented as an application domain extension (ADE). The ADE is semantically thin, mainly extending CityGML 2.0 to harmonise with national standards; in contrast, 3CIM is mainly based on linkages to external databases, registers, and operational systems for the semantic part. The current version, 3CIM 1.0, includes various themes, including Bridge, Building, Utility, City Furniture, Transportation, Tunnel, Vegetation, and Water. Three test areas were created with 3CIM data, one in each city. These data were evaluated in several use-cases, including visualisation as well as daylight, noise, and flooding simulations. The conclusion from these use-cases is that the 3CIM data, together with the linked external data sources, allow for the inclusion of the necessary information for the visualisation and simulations, but extract, transform, and load (ETL) processes are required to tailor the input data. The next step is to implement 3CIM within the three cities, which will entail several challenges, as discussed at the end of the paper.

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Section: Applications Of 3d City Modelsmentioning

confidence: 99%

Future Swedish 3D City Models—Specifications, Test Data, and Evaluation

Uggla¹,

Olsson

Abdi

et al. 2023

IJGI

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“…Since visual communication plays a fundamental role in the circulation of information, after this phase, the work was directed towards the creation of a city model. Under the constant evolutionary thrust of technology, city models constitute an extremely incisive and easy-to-understand element for the transmission of information and knowledge relating to the city [46], its history, and the events that interest or have involved it in the past [47,48]. Historical city models have assumed the role of tools for the knowledge and conservation of urban cultural heritage, configuring themselves as containers of histories that are usually written and difficult to analyze [6].…”

Section: From Historical Maps To City Modelsmentioning

confidence: 99%

A Geomatic Approach to the Preservation and 3D Communication of Urban Cultural Heritage for the History of the City: The Journey of Napoleon in Venice

2022

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The use of historical maps in a digital environment can give considerable support to the study of the history of cities. It allows you to combine information from different sources, processed according to different geomatic techniques, to provide a reconstruction of urban configurations of the past and their comparison with iconographic and textual documentation of the same period. The aim of the research is to try to make the knowledge of a historical event easily accessible by converging within a simple model the various sources on which the reconstruction itself is based. This paper deals with the reconstruction of the ephemeral architecture created for Napoleon’s visit to Venice through the generation of 3D virtual models. The reconstruction was approached through a rigorous method, inserting these models into the context for which they were conceived. The generation of the historical city model, taking advantage of the algorithms of structure from motion applied to photogrammetry, made it possible to compare it with what was shown by the old paintings depicting the event. Virtual models processed within the GIS environment have been uploaded online thanks to the use of WebGIS. We chose to share the research results on the internet to allow users to avail themselves of a space that no longer exists from within it, going beyond the pictorial images of the past, overcoming communication through rendering and videos. The simultaneous application of methods and techniques related to the various components of geomatics within the digital environment has enabled the operation of a faithful reconstruction of reality, bringing to light past urban scenarios that no longer exist and are only known through paintings.

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“…Generally, bottom-up UBEM is built by merging large datasets that describe buildings and user patterns. It is common to use available geographical information systems (GIS) datasets to generate building geometries, often referred to as 3D city models [31][32][33]. In Sweden, however, the standard for generating and managing 3D city models is still under development [31,34], which is a major barrier to automating UBEM generation.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, due to the lack of a standard, access to 3D city models is not centralized and each city decides on the level of detail or the tools they use to generate these models. [31,33,34].…”

Section: Introductionmentioning

confidence: 99%

Streamlining Building Energy Modelling Using Open Access Databases—A Methodology towards Decarbonisation of Residential Buildings in Sweden

2023

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The building sector is a major contributor to greenhouse gases, consuming significant energy and available resources. Energy renovation of buildings is an effective strategy for decarbonisation, as it lowers operational energy and avoids the embodied impact of new constructions. To be successful, the energy renovation process requires meaningful building models. However, the time and costs associated with obtaining accurate data on existing buildings make large-scale evaluations unrealistic. This study proposes a methodology to streamline building energy models from open-access datasets for urban scalability. The methodology was tested on six case study buildings representing different typologies of the Swedish post-war construction period. The most promising results were obtained by coupling OpenStreetMap-sourced footprints with energy performance declarations and segmented archetypes for building characterisation. These significantly reduced simulation time while retaining similar accuracy. The suggested methodology streamlines building energy modelling with a promising degree of automation and without the need for input from the user. The study concludes that municipalities and building owners could use a such methodology to develop roadmaps for cities to achieve carbon neutrality and evaluate energy renovation solutions. Future work includes achieving higher accuracy of the generated energy models through calibration, performing renovation analysis, and upscaling from individual buildings to neighbourhoods.

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3d City Models for Supporting Simulations in City Densifications

Cited by 4 publications

References 9 publications

Future Swedish 3D City Models—Specifications, Test Data, and Evaluation

Future Swedish 3D City Models—Specifications, Test Data, and Evaluation

A Geomatic Approach to the Preservation and 3D Communication of Urban Cultural Heritage for the History of the City: The Journey of Napoleon in Venice

Streamlining Building Energy Modelling Using Open Access Databases—A Methodology towards Decarbonisation of Residential Buildings in Sweden

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