scholarly journals CITY MODELLING USING GEOINFORMATICS: A CASE STUDY OF THE COLLEGE OF ENGINEERING CAMPUS, SALAHADDIN UNIVERSITY, IRAQ

2019 ◽  
Vol XLII-2/W16 ◽  
pp. 189-194
Author(s):  
H. Sadeq
Keyword(s):  
Satellite Imagery ◽  
Aerial Imagery ◽  
Digital Maps ◽  
3D City Model ◽  
Online Tools ◽  
City Model ◽  
Access To Data ◽  
College Of Engineering ◽  
High Resolution Method

<p><strong>Abstract.</strong> Although personal computers, smartphones and software for viewing 3D digital maps are available, online tools must be provided to aid people in different countries in visualising good locations for navigation and planning. This work presents a methodology for implementing geoinformatics to produce a 3D city model by using free rectified satellite imagery and stereo aerial imagery as data sources. Although satellite imagery has a low resolution (Thus, results will not be accurate if compared to aerial imagery.), the imagery is used to evaluate the potential of implementing such data for developing countries with limited access to data and resources. Satellite imagery with limited resolution can be used to produce models in LoD1 according to CityGML. For enhanced building details (i.e. LoD2) and an accurate 3D model, stereo aerial imagery is adopted, but this high-resolution method is costly. High-accuracy stereo aerial imagery is used to evaluate the model produced from the free satellite imagery. Finally, the results are published for online viewing.</p>

scholarly journals Validation Methods of Geometric 3D-CityGML Data for Urban Wind Simulations

2019 ◽  
Vol 128 ◽  
pp. 10006 ◽  
Author(s):  
Younis Saida Saeedrashed ◽  
Ali Cemal Benim
Keyword(s):  
Healing Process ◽  
Flow Simulation ◽  
Software Tools ◽  
Geometrical Structures ◽  
Geometric Data ◽  
3D City Model ◽  
City Model ◽  
Closed Shells

Validation of the geometric data such as 3D city model is quite crucial for simulation tasks, since the simulation process strongly correlates to the quality of geometric data being meshed. Validation methodology and healing of the 3D city models using different tools are presented. The most common inherited geometrical errors are checked and analyzed. Accordingly, an appropriate healing process to the case study is performed, which illustrates that the required closed solids and closed shells are obtained within the geometrical structures of the 3D city model being processed. Also, in this paper we compare some related open source and commercial software tools for the validation and healing process. It is noticed that they differ from each other in performing the required healing process. Some of them are quite good in healing specific errors, whereas not successful in healing the rest of errors. The goal of the paper is to obtain more understanding of the geometric validation and healing capabilities of various software tools, and the qualities of generated meshes, to lead to more effective and reliable simulations in the field of urban wind flow simulation.

scholarly journals Building Virtual 3D City Model for Smart Cities Applications: A Case Study on Campus Area of the University of Novi Sad

2020 ◽  
Vol 9 (8) ◽  
pp. 476 ◽  
Author(s):  
Dušan Jovanović ◽  
Stevan Milovanov ◽  
Igor Ruskovski ◽  
Miro Govedarica ◽  
Dubravka Sladić ◽  
...  
Keyword(s):  
Smart Cities ◽  
Airborne Lidar ◽  
3D City Models ◽  
3D City Model ◽  
City Model ◽  
Novi Sad ◽  
The University ◽  
The City ◽  
City Models

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.

scholarly journals DATA INTEGRATION OF DIFFERENT DOMAINS IN GEO-INFORMATION MANAGEMENT: A RAILWAY INFRASTRUCTURE CASE STUDY

2018 ◽  
Vol XLII-4 ◽  
pp. 121-127 ◽  
Author(s):  
M. Corongiu ◽  
G. Tucci ◽  
E. Santoro ◽  
O. Kourounioti
Keyword(s):  
Spatial Model ◽  
Three Dimensional ◽  
Reference Base ◽  
3D Objects ◽  
3D City Model ◽  
Model Following ◽  
Railway Infrastructure ◽  
Railway System ◽  
City Model

<p><strong>Abstract.</strong> A 3D city model is a representation of an urban environment with a three-dimensional geometry of common urban objects and structures, with buildings as the most prominent feature. In the last decades, 3D city models appear to have been predominantly used for visualisation; however, nowadays they are being increasingly employed in a number of domains and for a broad range of tasks beyond visualisation. The MUIF (Modello Unico dell’Infrastruttura Fisica) project, here illustrated as a case study, refers to the implementation of a single spatial model of the infrastructure of Italy’s railway system (RFI).</p><p> The authors describe preliminary results and the critical aspects of the study they are carrying out, explaining the processes and methodology to model all datasets into a single integrated spatial model as the reference base for future continuously updates. The case study refers to data collected by different sources and at various resolutions. An integrated spatial Database has been used for modelling topographic 3D objects, traditionally implemented in a 3D city model, as well as other specific 3D objects, related to the railway infrastructure that, usually, aren’t modelled in a 3D city model, following the same methodology as the first ones.</p>

scholarly journals The city model as a tool for participatory urban planning – a case study: The Bilotti open air museum of Cosenza

2014 ◽  
Vol II-5 ◽  
pp. 25-32
Author(s):  
S. Artese
Keyword(s):  
Urban Planning ◽  
Laser Scanner ◽  
Point Clouds ◽  
Web Gis ◽  
Scale Model ◽  
3D City Model ◽  
City Model ◽  
The City ◽  
Citizen’S Participation

The paper describes the implementation of the 3D city model of the pedestrian area of Cosenza, which in recent years has become the Bilotti Open Air Museum (MAB). For this purpose were used both the data available (regional technical map, city maps, orthophotos) and acquired through several surveys of buildings and "Corso Mazzini" street (photos, topographic measurements, laser scanner point clouds). In addition to the urban scale model, the survey of the statues of the MAB was carried out. By means of data processing, the models of the same statues have been created, that can be used as objects within the city model. <br><br> The 3D model of the MAB open air museum has been used to implement a Web-GIS allowing the citizen's participation, understanding and suggestions. The 3D city model is intended as a new tool for urban planning, therefore it has been used both for representing the current situation of the MAB and for design purposes, by acknowledging suggestions regarding a possible different location of the statues and a new way to enjoy the museum.

A Modern Base Map and 3D City Model Production - A Case Study “City of Sarajevo”

2021 ◽  
pp. 684-693
Author(s):  
Jasmin Taletović ◽  
Slobodanka Ključanin
Keyword(s):  
3D City Model ◽  
City Model

scholarly journals Procedural modeling applied to the 3D city model of bogota: a case study

2021 ◽  
Vol 3 (5) ◽  
pp. 423-433
Author(s):  
Gustavo Alomía ◽  
Diego Loaiza ◽  
Claudia Zúñiga ◽  
Xun Luo ◽  
Rafael Asorey-Cacheda
Keyword(s):  
Procedural Modeling ◽  
3D City Model ◽  
City Model

scholarly journals Creating Open Online Applications with Geospatial Interfaces - Case Study "Palvelututka"

2021 ◽  
Vol 27 (2) ◽  
pp. 1-14
Author(s):  
Juho-Pekka Virtanen ◽  
Arttu Julin ◽  
Kaisa Jaalama ◽  
Hannu Hyyppä
Keyword(s):  
Three Dimensional ◽  
Application Programming Interface ◽  
Application Development ◽  
Data Set ◽  
3D City Model ◽  
Combined Use ◽  
Application Programming ◽  
City Model ◽  
City Models

Three-dimensional city models are an increasingly common data set maintained by many cities globally. At the same time, the focus of research has shifted from their production to their utilization in application development. We present the implementation of a demonstrator application combining the online visualization of a 3D city information model with the data from an application programming interface. By this, we aim to demonstrate the combined use of city APIs and 3D geospatial assets, promote their use for application development and show the performance of existing, openly available tools for 3D city model application development

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

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.

scholarly journals Concept and Evaluation of Heating Demand Prediction Based on 3D City Models and the CityGML Energy ADE—Case Study Helsinki

2020 ◽  
Vol 9 (10) ◽  
pp. 602
Author(s):  
Maxim Rossknecht ◽  
Enni Airaksinen
Keyword(s):  
Co2 Emissions ◽  
District Heating ◽  
Relevant Information ◽  
Demand Prediction ◽  
3D City Model ◽  
Demand Reduction ◽  
City Model ◽  
Reduction Of Co2 ◽  
The City

This work presents a concept for heating demand and resulting CO2 emissions prediction based on a 3D city model in CityGML format in various scenarios under the consideration of a changing climate. In the case study of Helsinki, the Helsinki Energy and Climate Atlas, that provides detailed information for individual buildings conducting the heating demand, is integrated into the 3D city model using the CityGML Energy Application Domain Extension (Energy ADE) to provide energy-relevant information based on a standardized data model stored in a CityGML database, called 3DCityDB. The simulation environment SimStadt is extended to retrieve the information stored within the Energy ADE schema, use it during simulations, and write simulation results back to the 3DCityDB. Due to climate change, a heating demand reduction of 4% per decade is predicted. By 2035, a reduction of 0.7 TWh is calculated in the normal and of 1.5 TWh in the advanced refurbishment scenario. Including the proposed improvements of the district heating network, heating CO2 emissions are predicted to be reduced by up to 82% by 2035 compared to 1990. The City of Helsinki’s assumed heating demand reduction through the modernization of 2.0 TWh/a by 2035 is not achieved with a 3% refurbishment rate. Furthermore, the reduction of CO2 emissions is mainly achieved through lower CO2 emission factors of the district heating network in Helsinki.

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