scholarly journals Design and Development of a 3D Digital Cadastre Visualization Prototype

2018 ◽  
Vol 7 (10) ◽  
pp. 384 ◽  
Author(s):  
Davood Shojaei ◽  
Hamed Olfat ◽  
Abbas Rajabifard ◽  
Mark Briffa
Keyword(s):  
Cross Sections ◽  
Three Dimensional ◽  
Ground Surface ◽  
3D Models ◽  
Property Development ◽  
Web Based ◽  
Complex Spaces ◽  
Ownership Rights ◽  
Story Building

The massive property development of high-rises and complex structures above and below the ground surface in cities indicates the lack of land and high demand to use spaces. However, the existing land and property administration systems are mainly two dimensional and not capable of efficiently managing these complex spaces. As ownership rights on plans are recorded in paper or PDF, understanding these rights and making effective decisions and analyses can be difficult without having experience in the art of reading and interpreting plan information. This paper attempts to address these issues by presenting a prototype for visualizing three-dimensional land and property information. The aim of this prototype is to illustrate and communicate the requirements and benefits of a 3D digital cadastre platform. The prototype is a web-based application and includes functionality to display both legal and physical data, interact with 3D models, display administrative data, identify objects and search objects, visualize cross-sections, and undertake measurements in 3D. For this prototype, a multi-story building was selected as a case study and its 3D model was imported into the prototype to display ownership rights. The prototype was then evaluated by various stakeholders and their feedback was considered for future enhancement.

Integrity Assessment of Damaged Flexible Pipe Cross-Sections

2014 ◽  
Author(s):  
Guomin Ji ◽  
Bernt J. Leira ◽  
Svein Sævik ◽  
Frank Klæbo ◽  
Gunnar Axelsson ◽  
...  
Keyword(s):  
Cross Sections ◽  
Three Dimensional ◽  
Element Model ◽  
Computer Code ◽  
Flexible Pipe ◽  
Dynamic Stresses ◽  
Integrity Assessment ◽  
Residual Capacity ◽  
Nonlinear Finite Element Model

This paper presents results from a case study performed to evaluate the residual capacity of a 6″ flexible pipe when exposed to corrosion damages in the tensile armour. A three-dimensional nonlinear finite element model was developed using the computer code MARC to evaluate the increase in mean and dynamic stresses for a given number of damaged inner tensile armor wires. The study also includes the effect of these damages with respect to the associated stresses in the pressure spiral. Furthermore, the implications of a sequence of wire failures with respect to the accumulated time until cross-section failure in a probabilistic sense are addressed.

scholarly journals DISCOVERING AND SHARING OF SECRET ARCHITECTURES: THE HIDDEN TOMB OF THE PHARAOH OF EL-KHASNEH, JORDAN

2017 ◽  
Vol XLII-2/W3 ◽  
pp. 459-465 ◽  
Author(s):  
E. S. Malinverni ◽  
R. Pierdicca
Keyword(s):  
3D Models ◽  
Research Community ◽  
Ease Of Use ◽  
Environmental Condition ◽  
Web Based ◽  
Archaeological Heritage ◽  
Close Proximity ◽  
On Line ◽  
Minimal Hardware

The documentation of the archaeological heritage through 3D models to know ancient findings, has become a common practice within the international panorama. Using minimal hardware, as well as its ease of use in almost every environmental condition, make 3D sampling solutions based on Multiple View Stereo (MVS) matching and Structure from Motion techniques ideal for on-site documentation of excavations or emergencies. Moreover, the availability of inexpensive platforms for web-based visualization represents great benefit in the field of archaeology, where generally the low budged and the limitation of more complex instruments are a must. The case study presented in these pages, experienced in Petra, Jordan, moves towards this direction. In the close proximity of the El- Khasneh façade, is situated an excavation where two entrance, well preserved, give access to the Tomb of Pharaoh. The documentation described in these pages has the twofold objective of providing the research community with a priceless dataset, acquired for one of the most important heritage of the world that is partially still unknown and to share on line these computations. This work confirms how cultural heritage documentation and dissemination of architectural rests, that are important for tourism and their interactive visualization, can strongly benefit from the creation of 3D models and their sharing on the web. This particular archaeological setting is an interesting base for investigation, given the complexity of the structure and its precarious condition.

scholarly journals Delivering and using 3D models on the web: are we ready?

2017 ◽  
Vol 8 (17) ◽  
pp. 1 ◽  
Author(s):  
Roberto Scopigno ◽  
Marco Callieri ◽  
Matteo Dellepiane ◽  
Federico Ponchio ◽  
Marco Potenziani
Keyword(s):  
Three Dimensional ◽  
3D Models ◽  
Main Channel ◽  
High Quality ◽  
Specific Domain ◽  
Web Based ◽  
3D Data ◽  
Very High ◽  
Web Publishing ◽  
The Web

<p class="VARKeywords">Digital technologies are now mature for producing high quality digital replicas of Cultural Heritage (CH) assets. The research results produced in the last decade ignited an impressive evolution and consolidation of the technologies for acquiring high-quality digital three-dimensional (3D) models, encompassing both geometry and color. What remains still an open problem is how to deliver those data and related knowledge to our society. The web is nowadays the main channel for the dissemination of knowledge. Emerging commercial solutions for web-publishing of 3D data are consolidating and becoming a de-facto standard for many applications (e-commerce, industrial products, education, etc.). In this framework, CH is a very specific domain, requiring highly flexible solutions. Some recent experiences are presented, aimed at providing a support to the archival of archaeological 3D data, supporting web-based publishing of very high-resolution digitization results and finally enabling the documentation of complex restoration actions. All those examples have been recently implemented on the open-source 3D Heritage Online Presenter (3DHOP) platform, developed at CNR-ISTI.</p>

scholarly journals SHARING ON WEB 3D MODELS OF ANCIENT THEATRES. A METHODOLOGICAL WORKFLOW

2016 ◽  
Vol XLI-B2 ◽  
pp. 483-490 ◽  
Author(s):  
A. Scianna ◽  
M. La Guardia ◽  
M. L. Scaduto
Keyword(s):  
Methodological Approach ◽  
Three Dimensional ◽  
Spatial Models ◽  
3D Models ◽  
Web Based ◽  
Web 3D ◽  
The One ◽  
User Friendly ◽  
Geospatial Web Services ◽  
The Web

In the last few years, the need to share on the Web the knowledge of Cultural Heritage (CH) through navigable 3D models has increased. This need requires the availability of Web-based virtual reality systems and 3D WEBGIS. In order to make the information available to all stakeholders, these instruments should be powerful and at the same time very user-friendly. However, research and experiments carried out so far show that a standardized methodology doesn’t exist. All this is due both to complexity and dimensions of geometric models to be published, on the one hand, and to excessive costs of hardware and software tools, on the other. In light of this background, the paper describes a methodological approach for creating 3D models of CH, freely exportable on the Web, based on HTML5 and free and open source software. HTML5, supporting the WebGL standard, allows the exploration of 3D spatial models using most used Web browsers like Chrome, Firefox, Safari, Internet Explorer. The methodological workflow here described has been tested for the construction of a multimedia geo-spatial platform developed for three-dimensional exploration and documentation of the ancient theatres of Segesta and of Carthage, and the surrounding landscapes. The experimental application has allowed us to explore the potential and limitations of sharing on the Web of 3D CH models based on WebGL standard. Sharing capabilities could be extended defining suitable geospatial Web-services based on capabilities of HTML5 and WebGL technology.

scholarly journals Accuracy of 2D modeling approach for performance simulation of noncircular single- and dual-layer monolithic catalysts

2021 ◽  
Author(s):  
Behnam Mozaffari
Keyword(s):  
Cross Sections ◽  
Three Dimensional ◽  
Single Layer ◽  
Flow Region ◽  
3D Models ◽  
Catalytic Performance ◽  
Cross Sectional ◽  
2D Modeling ◽  
Modeling Approach ◽  
Monolithic Catalysts

This study aims to evaluate the accuracy of widely applied approach of modeling noncircular channels and washcoats of monolithic catalysts with equivalent circular geometrical shapes. For this purpose, catalytic performance of equivalent circular and square channel cross-sectional shapes with single-layer Pt/Al2O3 and dual-layer Fe-ZSM-5+Pt/Al2O3 washcoats are investigated. For the noncircular cross-sections, three-dimensional computational fluid dynamics models that consider species gases convection inside the channel bulk flow region, and reaction and diffusion of species inside the washcoat layer(s) are utilized to simulate the performance of one channel of the monolithic catalytic converters. In addition, in order to investigate the amount of inaccuracy of 2D modeling approach for noncircular channels, 2D models are applied to simulate the equivalent monolithic catalysts with circular cross-sections, and the results of the 2D and 3D models are compared together, and also, with the experimental and 1D+1D modeling technique results available in the literature.

scholarly journals SHARING ON WEB 3D MODELS OF ANCIENT THEATRES. A METHODOLOGICAL WORKFLOW

2016 ◽  
Vol XLI-B2 ◽  
pp. 483-490 ◽  
Author(s):  
A. Scianna ◽  
M. La Guardia ◽  
M. L. Scaduto
Keyword(s):  
Methodological Approach ◽  
Three Dimensional ◽  
Spatial Models ◽  
3D Models ◽  
Web Based ◽  
Web 3D ◽  
The One ◽  
User Friendly ◽  
Geospatial Web Services ◽  
The Web

In the last few years, the need to share on the Web the knowledge of Cultural Heritage (CH) through navigable 3D models has increased. This need requires the availability of Web-based virtual reality systems and 3D WEBGIS. In order to make the information available to all stakeholders, these instruments should be powerful and at the same time very user-friendly. However, research and experiments carried out so far show that a standardized methodology doesn’t exist. All this is due both to complexity and dimensions of geometric models to be published, on the one hand, and to excessive costs of hardware and software tools, on the other. In light of this background, the paper describes a methodological approach for creating 3D models of CH, freely exportable on the Web, based on HTML5 and free and open source software. HTML5, supporting the WebGL standard, allows the exploration of 3D spatial models using most used Web browsers like Chrome, Firefox, Safari, Internet Explorer. The methodological workflow here described has been tested for the construction of a multimedia geo-spatial platform developed for three-dimensional exploration and documentation of the ancient theatres of Segesta and of Carthage, and the surrounding landscapes. The experimental application has allowed us to explore the potential and limitations of sharing on the Web of 3D CH models based on WebGL standard. Sharing capabilities could be extended defining suitable geospatial Web-services based on capabilities of HTML5 and WebGL technology.

scholarly journals A Case Study of BIM Implementation in Rail Track Rehabilitation

2019 ◽  
Vol 4 (1) ◽  
pp. 8 ◽  
Author(s):  
José Neves ◽  
Zita Sampaio ◽  
Manuel Vilela
Keyword(s):  
Three Dimensional ◽  
Parametric Representation ◽  
3D Models ◽  
Information Modeling ◽  
Planning And Scheduling ◽  
Track Geometry ◽  
Rail Track ◽  
Building Information ◽  
Types Of Information

Building Information Modeling (BIM) is an Industry 4.0 methodology that is increasingly used in the domain of Architecture, Engineering, and Construction (AEC). BIM emerges as a new methodology, one that is more collaborative and based on parametric three-Dimensional (3D) models, centralizing different types of information of a geometric, physical, and economic nature. The purpose of this paper is to analyze the application of the BIM methodology to a rail track rehabilitation case study using a geotextile and geogrid in the ballast layer base. The creation of the 3D and 4D BIM models was performed using various BIM-based tools, which made it possible to achieve the spatial and parametric representation of the rail track and the simulation of the main construction tasks. A new BIM object pertaining to the rail track was created. This paper describes the procedures applied in achieving the BIM models, the limitations involved, and the interoperability between the BIM tools. Additionally, the potential for information extraction with respect to the infrastructure design, construction, and operation, e.g., planning and scheduling, quantities, graphic outputs, and track geometry quality, was demonstrated. It was concluded that the BIM methodology was viable and could be implemented with benefits, despite certain difficulties and limitations, which emphasize the need for further developments.

scholarly journals The use of extruded finite-element models as a novel alternative to tomography-based models: a case study using early mammal jaws

2019 ◽  
Vol 16 (161) ◽  
pp. 20190674 ◽  
Author(s):  
Nuria Melisa Morales-García ◽  
Thomas D. Burgess ◽  
Jennifer J. Hill ◽  
Pamela G. Gill ◽  
Emily J. Rayfield
Keyword(s):  
Finite Element ◽  
Mechanical Performance ◽  
Low Cost ◽  
Three Dimensional ◽  
3D Models ◽  
Stress And Strain ◽  
Finite Element Models ◽  
Average Width ◽  
Performance Results

Finite-element (FE) analysis has been used in palaeobiology to assess the mechanical performance of the jaw. It uses two types of models: tomography-based three-dimensional (3D) models (very accurate, not always accessible) and two-dimensional (2D) models (quick and easy to build, good for broad-scale studies, cannot obtain absolute stress and strain values). Here, we introduce extruded FE models, which provide fairly accurate mechanical performance results, while remaining low-cost, quick and easy to build. These are simplified 3D models built from lateral outlines of a relatively flat jaw and extruded to its average width. There are two types: extruded (flat mediolaterally) and enhanced extruded (accounts for width differences in the ascending ramus). Here, we compare mechanical performance values resulting from four types of FE models (i.e. tomography-based 3D, extruded, enhanced extruded and 2D) in Morganucodon and Kuehneotherium . In terms of absolute values, both types of extruded model perform well in comparison to the tomography-based 3D models, but enhanced extruded models perform better. In terms of overall patterns, all models produce similar results. Extruded FE models constitute a viable alternative to the use of tomography-based 3D models, particularly in relatively flat bones.

Construction and Application of 3D and 2D Type Maps for Linkages

2012 ◽  
Vol 433-440 ◽  
pp. 2377-2386
Author(s):  
Wen Yeuan Chung
Keyword(s):  
Numerical Analysis ◽  
Design Process ◽  
Cross Sections ◽  
Three Dimensional ◽  
Solid Modeling ◽  
3D Models ◽  
Output Link ◽  
Different Types ◽  
Modeling Software ◽  
Drag Link

The 3D and 2D type maps for planar four-bar and simply RSSR linkages are constructed with illustration of their application. The criteria determining the rotatability of input or output link are developed or reviewed for both linkages. Three-dimensional type maps are then constructed by integrating the tool for numerical analysis and solid modeling software, e.g. MATLAB and PRO/E. The coordinate axes are mainly three ratios of link lengths. The types are classified based on whether the input or output link can make fully rotation. Each type map is composed of five regions representing different types. They are drag link, crank-rocker, rocker-crank, double-rocker, and unassembled. Any cross sections can be taken readily and arbitrarily from the 3D models along any plane or surfaces to get 2D type maps. The constructed type maps are also combined with curves or surfaces representing performances of transmission ratio. With type maps and related surfaces, the design process can be simplified and expedited substantially.

scholarly journals The Photogrammetric Survey of the Phoenician and Punic Necropolis of Nora and Three-Dimensional Rendering Tools for Sharing Data

2021 ◽  
Vol 10 (1) ◽  
pp. 17
Author(s):  
Simone Berto ◽  
Filippo Carraro ◽  
Daniele Morabito ◽  
Jacopo Bonetto ◽  
Giuseppe Salemi
Keyword(s):  
Research Team ◽  
Three Dimensional ◽  
3D Models ◽  
Point Of View ◽  
Archaeological Survey ◽  
Web Based ◽  
Survey Tool ◽  
Testing Ground ◽  
Specific Focus

The hypogea of the Punic necropolis of Nora represented a testing ground for the use of photogrammetry as an archaeological survey tool in a highly critical context, both from the point of view of the survey itself and from the point of view of the understanding and dissemination of the underground evidence. The study describes the acquisition techniques and the tools used to share the 3D models, both among the research team and with external users, with a specific focus on web-based tools (Potree).

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