Assessment of the photovoltaic potential at urban level based on 3D city models: A case study and new methodological approach

The Smart Cities data and applications need to replicate, as faithfully as possible, the state of the city and to simulate possible alternative futures. In order to do this, the modelling of the city should cover all aspects of the city that are relevant to the problems that require smart solutions. In this context, 2D and 3D spatial data play a key role, in particular 3D city models. One of the methods for collecting data that can be used for developing such 3D city models is Light Detection and Ranging (LiDAR), a technology that has provided opportunities to generate large-scale 3D city models at relatively low cost. The collected data is further processed to obtain fully developed photorealistic virtual 3D city models. The goal of this research is to develop virtual 3D city model based on airborne LiDAR surveying and to analyze its applicability toward Smart Cities applications. It this paper, we present workflow that goes from data collection by LiDAR, through extract, transform, load (ETL) transformations and data processing to developing 3D virtual city model and finally discuss its future potential usage scenarios in various fields of application such as modern ICT-based urban planning and 3D cadaster. The results are presented on the case study of campus area of the University of Novi Sad.

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DEVELOPMENT OF A DIGITAL 3D PARTICIPATION PLATFORM – CASE STUDY OF WEILIMDORF (STUTTGART, GERMANY)

ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences ◽

10.5194/isprs-archives-xlvi-4-w1-2021-123-2021 ◽

2021 ◽

Vol XLVI-4/W1-2021 ◽

pp. 123-129

Author(s):

P. Würstle ◽

T. Santhanavanich ◽

R. Padsala ◽

V. Coors

Keyword(s):

Public Participation ◽

Large Scale ◽

Digital Tools ◽

3D City Models ◽

3D City Model ◽

City Model ◽

Participation Process ◽

The Web ◽

City Models

Abstract. This paper explains the development of a 3D city model-based Public Participation Platform as a prototype and its implementation in a real-world public participation process to redevelop the Weilimdorf area of Stuttgart city. Alongside conducting Weilimdorf’s public participation process, the goal of the mentioned public participation platform is to research citizens’ acceptance of such tools. The usage of digital tools has become more critical for participation processes. The need for social distancing expedites this change, particularly during the pandemic. Previous research frequently focuses on 2D platforms and smaller sample sizes but nevertheless shows the importance of such tools. However, with current developments in geospatial and web streaming technologies, it has become easier and faster to visualize large-scale 3D city models over the web. In this research, these technologies were used by the citizens of the Weilimdorf area to evaluate the usability of the platform and collect their feedback. The result shows that such a digital public participation platform is a valuable supplement to traditional in-person public participation methods.

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3D city models for urban farming site identification in buildings

Computers Environment and Urban Systems ◽

10.1016/j.compenvurbsys.2020.101584 ◽

2021 ◽

Vol 86 ◽

pp. 101584

Author(s):

Ankit Palliwal ◽

Shuang Song ◽

Hugh Tiang Wah Tan ◽

Filip Biljecki

Keyword(s):

Urban Farming ◽

3D City Models ◽

Site Identification ◽

City Models

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From consistency to flexibility: A simplified database schema for the management of CityJSON 3D city models

Transactions in GIS ◽

10.1111/tgis.12807 ◽

2021 ◽

Author(s):

Gilles‐Antoine Nys ◽

Roland Billen

Keyword(s):

Database Schema ◽

3D City Models ◽

City Models

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Methods for conducting international Delphi surveys to optimise global participation in core outcome set development: a case study in gastric cancer informed by a comprehensive literature review

Trials ◽

10.1186/s13063-021-05338-x ◽

2021 ◽

Vol 22 (1) ◽

Author(s):

Bilal Alkhaffaf ◽

Jane M. Blazeby ◽

Aleksandra Metryka ◽

Anne-Marie Glenny ◽

Ademola Adeyeye ◽

...

Keyword(s):

Gastric Cancer ◽

Literature Review ◽

Healthcare Professionals ◽

Vascular Malformations ◽

Methodological Approach ◽

Core Outcome Set ◽

Core Outcome ◽

Comprehensive Literature Review ◽

International Participation

Abstract Background Core outcome sets (COS) should be relevant to key stakeholders and widely applicable and usable. Ideally, they are developed for international use to allow optimal data synthesis from trials. Electronic Delphi surveys are commonly used to facilitate global participation; however, this has limitations. It is common for these surveys to be conducted in a single language potentially excluding those not fluent in that tongue. The aim of this study is to summarise current approaches for optimising international participation in Delphi studies and make recommendations for future practice. Methods A comprehensive literature review of current approaches to translating Delphi surveys for COS development was undertaken. A standardised methodology adapted from international guidance derived from 12 major sets of translation guidelines in the field of outcome reporting was developed. As a case study, this was applied to a COS project for surgical trials in gastric cancer to translate a Delphi survey into 7 target languages from regions active in gastric cancer research. Results Three hundred thirty-two abstracts were screened and four studies addressing COS development in rheumatoid and osteoarthritis, vascular malformations and polypharmacy were eligible for inclusion. There was wide variation in methodological approaches to translation, including the number of forward translations, the inclusion of back translation, the employment of cognitive debriefing and how discrepancies and disagreements were handled. Important considerations were identified during the development of the gastric cancer survey including establishing translation groups, timelines, understanding financial implications, strategies to maximise recruitment and regulatory approvals. The methodological approach to translating the Delphi surveys was easily reproducible by local collaborators and resulted in an additional 637 participants to the 315 recruited to complete the source language survey. Ninety-nine per cent of patients and 97% of healthcare professionals from non-English-speaking regions used translated surveys. Conclusion Consideration of the issues described will improve planning by other COS developers and can be used to widen international participation from both patients and healthcare professionals.

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