4,775 research outputs found

    Training of Crisis Mappers and Map Production from Multi-sensor Data: Vernazza Case Study (Cinque Terre National Park, Italy)

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    This aim of paper is to presents the development of a multidisciplinary project carried out by the cooperation between Politecnico di Torino and ITHACA (Information Technology for Humanitarian Assistance, Cooperation and Action). The goal of the project was the training in geospatial data acquiring and processing for students attending Architecture and Engineering Courses, in order to start up a team of "volunteer mappers". Indeed, the project is aimed to document the environmental and built heritage subject to disaster; the purpose is to improve the capabilities of the actors involved in the activities connected in geospatial data collection, integration and sharing. The proposed area for testing the training activities is the Cinque Terre National Park, registered in the World Heritage List since 1997. The area was affected by flood on the 25th of October 2011. According to other international experiences, the group is expected to be active after emergencies in order to upgrade maps, using data acquired by typical geomatic methods and techniques such as terrestrial and aerial Lidar, close-range and aerial photogrammetry, topographic and GNSS instruments etc.; or by non conventional systems and instruments such us UAV, mobile mapping etc. The ultimate goal is to implement a WebGIS platform to share all the data collected with local authorities and the Civil Protectio

    The West Digital Conservatory of Archaelogical Heritage Project

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    International audienceThe West Digital Conservatory of Archaeological Heritage project, a.k.a. WDCAH, is a new French research organization whose aim is to both ensure the preservation of digital archaeological data, and deliver expertise in production, analysis, visualization and virtual reality exploration techniques. This project is an interdisciplinary project composed of engineers and researchers in archaeology, computer science, virtual reality and 3D interaction with virtual environments. The major objectives of this conservatory project are: (i) sustainable and centralized safeguarding and archiving of 2D/3D data produced by the archaeological community; (ii) free access to metadata; (iii) secure access to data for the different actors involved in scientific projects and (iv) the support and advice for these actors in the 3D data production and exploration through the latest digital technologies, modeling tools and virtual reality systems. Today the first activities of the WDCAH mainly concern digital models production using photogrammetry, 3D laser scans, and 3D computer graphics software. We are currently working on the reconstitution of six archaeological sites located in the west of France ranging from prehistory to the Middle Ages: the Cairn of Carn Island, the covered pathway of Roh Coh Coet, the Goh Min Ru megalithic site, the gallo-roman mansion of Vanesia, the keep of the ChĂąteau de Sainte-Suzanne, the Porte des Champs of the ChĂąteau d'Angers. Other proposals are currently under study

    Innovative Approaches to 3D GIS Modeling for Volumetric and Geoprocessing Applications in Subsurface Infrastructures in a Virtual Immersive Environment

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    As subsurface features remain largely ‘out of sight, out of mind’, this has led to challenges when dealing with underground space and infrastructures and especially so for those working in GIS. Since subsurface infrastructure plays a major role in supporting the needs of modern society, groups such as city planners and utility companies and decision makers are looking for an ‘holistic’ approach where the sustainable use of underground space is as important as above ground space. For such planning and management, it is crucial to examine subsurface data in a form that is amenable to 3D mapping and that can be used for increasingly sophisticated 3D modeling. The subsurface referred to in this study focuses particularly on examples of both shallow and deep underground infrastructures. In the case of shallow underground infrastructures mostly two-dimensional maps are used in the management and planning of these features. Depth is a very critical component of underground infrastructures that is difficult to represent in a 2D map and for this reason these are best studied in three-dimensional space. In this research, the capability of 3D GIS technology and immersive geography are explored for the storage, management, analysis, and visualization of shallow and deep subsurface features

    Hybrid 3D Rendering of Large Map Data for Crisis Management

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    In this paper we investigate the use of games technologies for the research and the development of 3D representations of real environments captured from GIS information and open source map data. Challenges involved in this area concern the large data-sets to be dealt with. Some existing map data include errors and are not complete, which makes the generation of realistic and accurate 3D environments problematic. The domain of application of our work is crisis management which requires very accurate GIS or map information. We believe the use of creating a 3D virtual environment using real map data whilst correcting and completing the missing data, improves the quality and performance of crisis management decision support system to provide a more natural and intuitive interface for crisis managers. Consequently, we present a case study into issues related to combining multiple large datasets to create an accurate representation of a novel, multi-layered, hybrid real-world maps. The hybrid map generation combines LiDAR, Ordnance Survey, and OpenStreetMap data to generate 3D cities spanning 1 km2. Evaluation of initial visualised scenes is presented. Initial tests consist of a 1 km2 landscape map containing up to 16 million vertices’ and run at an optimal 51.66 frames per-second

    Visualization of Vibrant Cities and Regions – Identification, Design and Development of 3D-GIS Applications and Modules

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    Facing a continuous state of transition and herewith connected financial, societal and ecological challenges such as the climate or demographic change (United Nations 2013), cities try to integrate innovative information and communication technologies in order to optimize administrative processes, legitimize decision making and to involve all relevant local actors into processes of public relevance. In this context 3D-GIS-models offer various not yet exploited potentials for all named levels of interest. This paper presents an overview over existing application fields for 3D-GIS-solutions, further proposing a categorization in order to be able to develop and implement target-oriented solutions. Moreover, this paper presents the project activities of the Fraunhofer IAO, the city of Cologne and the provider of geo-information-services ESRI, designing and developing end-user oriented applications for the 3D-GIS-tool CityEngine. Therefore various city departments such as the agencies for city planning, traffic and environment were involved in an iterative process in order to identify potential application fields and their benefits within the administrative work as well as their andvantages regarding existing solutions and processes. Aditionally, the particpants decided upon a set of focus applications to be developed within the project. Therefore, this document will concentrate on the potential benefits of the identified and cooperatively designed application fields, further outlining the first steps of the deleopment phase of the citizen particpiation application

    BIM Effect on the Quality of Communication in the Project Management of Smart Cities

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    The concept of smart cities points out the future cities, which will incorporate IoT and digitalization for facilitating the communication among people, their devices, government services, and various facilities that can provide enough services for the enormous population in the future cities. To achieve the goal of having the ideal smart cities, it is necessary to go digital and plan for having virtual imagination for every component in the cities, including the construction facilities. BIM method as a means of having a virtual vision of each element of the construction project glows in mind as one sort of assistance to reach this target. This thesis investigates the impact of BIM on the quality of communication in the future smart cities based on the literature review of the three smartest cities including Singapore, London, and Manchester.:Table of Contents List of Figures IV List of Tables V List of Abbreviations VI 1 Introduction 1 1.1 Problem Statement 1 1.2 Aim of the Study 3 1.3 Research Question 4 1.4 Methodology 4 1.5 Structure of Work 5 2 Research Methodology 6 2.1 Introduction 6 2.2 Overview of Common Research Methods 6 2.2.1 Inductive Method 6 2.2.2 Deductive Method 7 2.2.3 Inductive vs. Deductive Method 8 2.2.4 Quantitative Research 8 2.2.5 Qualitative Research 9 2.2.6 Tools for Data Collection 10 2.3 Research Scheme of This Thesis 16 3 Literature Review and Historical Background 19 3.1 Introduction to BIM 19 3.2 BIM Definition 20 3.2.1 National Institute of Building Sciences (NIBS) 20 3.2.2 Autodesk 22 3.2.3 Associated General Contractors of America (AGC) 22 3.3 BIM Levels 24 3.4 Application of BIM 25 3.4.1 Advantages of BIM 27 3.4.2 Disadvantages of BIM 29 3.5 History of employing BIM in construction projects 30 3.5.1 Before the year 2000 30 3.5.2 After the year 2000 31 3.6 Communication in construction projects 32 3.6.1 Communication, Combination of Factors 32 3.6.2 Communication Disorders in Construction Projects 33 3.7 BIM and Project Management 35 3.7.1 BIM vs. PMBOK 36 3.8 Smart Cities 36 3.8.1 Communication in smart city projects 37 3.8.2 Project Management in Smart Cities 39 3.9 Literature Review or Relevant previous studies 40 4 Case- Study 44 4.1 Singapore 44 4.1.1 BIM Use in Singapore 45 4.1.2 ITS Projects in Singapore 49 4.1.3 Intelligent Productivity and Safety System (IPASS) 50 4.1.4 Addressing Communication Challenges by BIM in the projects in Singapore 50 4.2 London, United Kingdom (UK) 52 4.2.1 Smart Projects in London (UK) 53 4.2.2 BIM Use in UK 55 4.2.3 Addressing Communication Challenges by BIM in the projects in UK 56 5 Conclusion 61 5.1 Summary of results 61 5.1.1 Findings of the Questions 62 5.2 Further Research Recommendation 63 Bibliography VII

    nD modelling: Industry uptake considerations

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    Purpose – The purpose of this paper is to identify the key enablers and obstacles to the effective adoption and use of nD modelling technology. Design/methodology/approach – This paper explores the feasibility of industry absorbing and diffusing nD modelling technology by considering key technology transfer issues; namely, organisational direction, inter-organisational networks and the knowledge characteristics of technology. Findings from semi-structured interviews around a diagnostic technology transfer framework are used to offer implications for theory and practice. Findings – The results from 15 survey interviews indicate that construction professionals appreciate the potential significant benefits of nD modelling technology, but at present, nD modelling technology is seen as too embryonic; too far removed from construction firms' “comfort zones”; requiring too much investment; and, containing too many risks. Originality/value – The paper stresses that the challenge for nD modelling technology, along with any new technology, is to shift from its “technology push” emphasis, to a more balanced “market orientated” stance, which allows the technology to be shaped by both strategic design concerns, and day-to-day operational needs. If this trajectory is pursued, nD modelling technology could have a positive future

    Integration of 3 dimensional parametric building model with geographic information systems in educational facilities planning and management

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    The efficient management of buildings and grounds of colleges and universities require an increased amount of information that is current, well organized and easy to access. This information is first generated at the planning stage of the facility before it is even designed. A seamless database containing current and accurate information about the facility and a tool that allows decision-makers to graphically relate the database with the physical location of the information provides a system to better integrate the decision making process from planning to actual operations and maintenance of the facility. This thesis presents an operational environment for facilities managers that integrates the 3 dimensional parametric building modeling with geographic information systems, both related to a common database, and explores the possible benefits and costs of using this integrated system

    Specification of vertical semantic consistency rules of UML class diagram refinement using logical approach

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    Unified Modelling Language (UML) is the most popular modelling language use for software design in software development industries with a class diagram being the most frequently use diagram. Despite the popularity of UML, it is being affected by inconsistency problems of its diagrams at the same or different abstraction levels. Inconsistency in UML is mostly caused by existence of various views on the same system and sometimes leads to potentially conflicting system specifications. In general, syntactic consistency can be automatically checked and therefore is supported by current UML Computer-aided Software Engineering (CASE) tools. Semantic consistency problems, unlike syntactic consistency problems, there exists no specific method for specifying semantic consistency rules and constraints. Therefore, this research has specified twenty-four abstraction rules of class‟s relation semantic among any three related classes of a refined class diagram to semantically equivalent relations of two of the classes using a logical approach. This research has also formalized three vertical semantic consistency rules of a class diagram refinement identified by previous researchers using a logical approach and a set of formalized abstraction rules. The results were successfully evaluated using hotel management system and passenger list system case studies and were found to be reliable and efficient
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