A Data Structure to Incorporate Versioning in 3d City Models

Vitalis, Stelios; Labetski, Anna; Ohori, G.A.K. Arroyo; Ledoux, Hugo; Stoter, J.E.

doi:10.5194/isprs-annals-iv-4-w8-123-2019

Cited by 15 publications

(26 citation statements)

References 9 publications

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“…That is, there are many different lifecycle aspects and they need to be considered when implementing a 3D city model. Some examples in the literature where this is described are in CityGML 3.0 where a new versioning module is added [64], and a new approach for versioning of 3D city models in CityJSON is proposed by [65]. To use the Product Lifecycle Support standard [66] is another approach described by [67].…”

Section: Versioning Of 3d City Modelsmentioning

confidence: 99%

Requirements, Development, and Evaluation of A National Building Standard—A Swedish Case Study

Eriksson

Johansson

Olsson

et al. 2020

IJGI

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The aim of this paper is to present a proposal for a national building standard in Sweden. We define requirements for the proposed standard, e.g., it should support development of 3D city models, connect to building information models (BIM) and national registers and be based on a national classification system for the urban environment. Based on these requirements we develop an Application Domain Extension (ADE) of the building model in the proposed CityGML 3.0 standard denoted CityGML Sve-Test. CityGML 3.0 includes several new features of interest, e.g., the space concept, enhanced possibilities to convert data, and to link to other standards. In our study we create test data according to CityGML Sve-Test and evaluate it against the requirements. It is shown that BIM models (in Industry Foundation Classes, IFC, format) can be converted to CityGML Sve-Test and that a classification system facilitates this conversion. The CityGML Sve-Test dataset can be used to increase the automation level in building permissions checking and a related study shows that CityGML 3.0 has capabilities to link to legal information and be a base for 3D cadastral index maps. Based on our experience, we suggest that the national building standard should conform to international standards and, if possible, include a classification system. The exchange format (GML, JSON etc.) might change, but to be based on a standardized data model ensures harmonized structures and concepts.

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Section: Versioning Of 3d City Modelsmentioning

confidence: 99%

Requirements, Development, and Evaluation of A National Building Standard—A Swedish Case Study

Eriksson

Johansson

Olsson

et al. 2020

IJGI

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show abstract

“…Versioning is utilised for the management of changes in information, and is well established in the realm of computer programming where it can be used to track changes in source code (Spinellis, 2005). In the realm of 3D city models, new versions are regularly created due to the fact that cities themselves are constantly changing, the modelling aspect of a project may change, or certain maintenance processes may cause changes to a dataset (Vitalis et al, 2019).…”

Section: Versioning For 3d City Modelsmentioning

confidence: 99%

“…In addition, there is currently no software implementation for the versioning mechanism of CityGML files. Vitalis et al (2019) proposed and implemented a framework that focuses specifically on solving the problem of storing the versions of multiple city objects in a semantic-agnostic way. In their methodology, all versions of all objects are stored in a single file where a CityJSON file acts as a repository, referred to as "versioned CityJSON" (vCityJSON).…”

Section: Versioning For 3d City Modelsmentioning

confidence: 99%

“…We set the following requirements regarding the application's functionality: 1) * Corresponding author a 3D geometric viewer with support for the main geometric types (from ISO 19107:2003: Geographic information-Spatial schema (2003); 2) a clean way to investigate the model's semantics (e.g. city objects' hierarchy and attributes); 3) an easy way to show and edit information for specific city objects; and 4) a straightforward viewer for versioning information stored in a dataset, based on the data structure proposed by Vitalis et al (2019).…”

Section: Introductionmentioning

confidence: 99%

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Cityjson + Web = Ninja

Vitalis

Labetski

Boersma

et al. 2020

ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci.

Self Cite

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Abstract. As web applications become more popular, 3D city models would greatly benefit from a proper web-based solution to visualise and manage them. CityJSON was introduced as a JSON encoding of the CityGML data model and promises, among several benefits, the ability to be integrated with modern web technologies. In order to provide an implementation of a web application for CityJSON data, that can be used as a reference for other applications, we developed ninja. It is a web application that allows the user to easily load and investigate a CityJSON model through a web browser. In addition, it offers support for a complex feature of CityJSON: the experimental versioning mechanism. In this paper, we describe the motivation, requirements, technical aspects and achieved functionality of ninja. We believe that such a web application can facilitate the adoption of 3D city models by more practitioners and decision makers.

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“…The question is whether this really is needed or if it is sufficient to use a simpler versioning method. Therefore two other versioning methods for 3D city models are included in the evaluation: the new versioning module and lifecycle representations in the proposed version 3.0 of CityGML (Kutzner & Kolbe, 2018) and the modified Git versioning control technique implemented in CityJSON (Vitalis, Labetski, Ohori, LeDoux, & Stoter, 2019).…”

Section: Introductionmentioning

confidence: 99%

Comparison of versioning methods to improve the information flow in the planning and building processes

Eriksson

Sun

Tarandi

et al. 2020

Transactions in GIS

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Version management is a prerequisite for digital information flow between phases in the planning and building processes. Information evolves over time and many parties retrieve information from the various phases. The aim of this article is to evaluate versioning methods, focusing on geodata buildings in the 3D cadastre process. The main attention in the evaluation is on the comprehensive ISO standard Product Lifecycle Support (PLCS). PLCS is evaluated against two simpler versioning methods, the versioning in CityGML 3.0 and a modified Git versioning method implemented in CityJSON. CityGML 3.0 fulfils all but one requirement and PLCS meets all. The methods vary in complexity; the Git proposal is a simple solution, easy to implement and maintain, while PLCS includes all functionalities and is complex to implement. There is a trade‐off between number of functionalities and complexity, it is therefore important that the intended purpose determines the choice of versioning method.

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A Data Structure to Incorporate Versioning in 3d City Models

Cited by 15 publications

References 9 publications

Requirements, Development, and Evaluation of A National Building Standard—A Swedish Case Study

Requirements, Development, and Evaluation of A National Building Standard—A Swedish Case Study

Cityjson + Web = Ninja

Comparison of versioning methods to improve the information flow in the planning and building processes

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