Three Dimensional Volunteered Geographic Information

2014 ◽  
Vol 3 (2) ◽  
pp. 19-34 ◽  
Author(s):  
Maria Antonia Brovelli ◽  
Marco Minghini ◽  
Giorgio Zamboni
Keyword(s):  
Mobile Devices ◽  
3D Visualization ◽  
Three Dimensional ◽  
Volunteered Geographic Information ◽  
Expressive Power ◽  
Geographic Information ◽  
Field Surveys ◽  
Virtual Globes ◽  
Third Dimension ◽  
The City

The dawn of GeoWeb 2.0, the geographic extension of Web 2.0, has opened new possibilities in terms of online dissemination and sharing of geospatial contents, thus laying the foundations for a fruitful development of Volunteered Geographic Information (VGI) systems. The purpose of the study is to investigate the extension of VGI applications, which are quite mature in the traditional bi-dimensional framework, up to the third dimension by means of virtual globes. Inspired by the visionary idea of Digital Earth, virtual globes are changing the way people approach to geographic information on the Web. Unlike the 2D visualization typical of Geographic Information Systems (GIS), virtual globes offer multi-dimensional, fully-realistic content visualization which allows for a much richer user experience. The proposed system should couple a powerful 3D visualization with an increase of public participation thanks to a tool allowing data collecting from mobile devices (e.g. smartphones and tablets). The participative application, built using the open source NASA World Wind virtual globe, is focused on the cultural and tourism heritage of Como city, located in Northern Italy. Users can create and manage customized projects and populate a catalogue of cartographic layers which is available to the entire community. Together with historical maps and the current cartography of the city, the system is also able to manage geo-tagged data, which come from user field-surveys performed through mobile devices in order to report POIs (Points Of Interest). Users can also extend POIs information adding more textual and multimedia contexts (e.g. images, audios and videos) directly on the globe. All in all, the resulting application allows users to create and share contributions as it usually happens on social platforms, additionally providing a realistic 3D representation enhancing the expressive power of data.

Three Dimensional Volunteered Geographic Information

2016 ◽  
pp. 1881-1898
Author(s):  
Maria Antonia Brovelli ◽  
Marco Minghini ◽  
Giorgio Zamboni
Keyword(s):  
Mobile Devices ◽  
3D Visualization ◽  
Three Dimensional ◽  
Volunteered Geographic Information ◽  
Expressive Power ◽  
Geographic Information ◽  
Virtual Globes ◽  
Third Dimension ◽  
The City ◽  
The Web

The dawn of GeoWeb 2.0, the geographic extension of Web 2.0, has opened new possibilities in terms of online dissemination and sharing of geospatial contents, thus laying the foundations for a fruitful development of Volunteered Geographic Information (VGI) systems. The purpose of the study is to investigate the extension of VGI applications, which are quite mature in the traditional bi-dimensional framework, up to the third dimension by means of virtual globes. Inspired by the visionary idea of Digital Earth, virtual globes are changing the way people approach to geographic information on the Web. Unlike the 2D visualization typical of Geographic Information Systems (GIS), virtual globes offer multi-dimensional, fully-realistic content visualization which allows for a much richer user experience. The proposed system should couple a powerful 3D visualization with an increase of public participation thanks to a tool allowing data collecting from mobile devices (e.g. smartphones and tablets). The participative application, built using the open source NASA World Wind virtual globe, is focused on the cultural and tourism heritage of Como city, located in Northern Italy. Users can create and manage customized projects and populate a catalogue of cartographic layers which is available to the entire community. Together with historical maps and the current cartography of the city, the system is also able to manage geo-tagged data, which come from user field-surveys performed through mobile devices in order to report POIs (Points Of Interest). Users can also extend POIs information adding more textual and multimedia contexts (e.g. images, audios and videos) directly on the globe. All in all, the resulting application allows users to create and share contributions as it usually happens on social platforms, additionally providing a realistic 3D representation enhancing the expressive power of data.

scholarly journals THE DATA RELIABILITY OF VOLUNTEERED GEOGRAPHIC INFORMATION WITH USING TRAFFIC ACCIDENT DATA

2017 ◽  
Vol IV-4/W4 ◽  
pp. 363-365
Author(s):  
H. K. Sevinç ◽  
I. R. Karaş
Keyword(s):  
Information System ◽  
Geographic Information System ◽  
Mobile Devices ◽  
Traffic Accident ◽  
Great Part ◽  
Real Data ◽  
Volunteered Geographic Information ◽  
Geographic Information ◽  
Mobile Technologies ◽  
Geographical Information

The development of mobile technologies is important in the lives of humans. Mobile devices constitute a great part of the daily lives of people. It has come to such a point that when people first wake up, they check their smart phones for the first thing. Users may share their positions with the GNSS sensors in mobile devices or they can add information about their positions in mobile applications. Users contribute to Geographical Information System with this sharing. These users consist of native (citizens) living in that geographical position not of the CBS specialists. Creating, collecting, sharing and disseminating the geographical data provided by voluntary individuals constitute the Volunteered Geographic Information System. The data in the Volunteered Geographic Information System are received from amateur users.<br><br> “How reliable will the data received from amateur users instead of specialists of the field be in scientific terms?” In this study, the reliability between the data received from the voluntary users through Volunteered Geographic Information System and real data is investigated. The real data consist of the traffic accident coordinates. The data that will be received from users will be received through the speed values in the relevant coordinates and the marking of the users for possible accident points on the map.

scholarly journals Approaching Bike Hazards via Crowdsourcing of Volunteered Geographic Information

2020 ◽  
Vol 12 (17) ◽  
pp. 7015
Author(s):  
Rafael Hologa ◽  
Nils Riach
Keyword(s):  
Small Group ◽  
Volunteered Geographic Information ◽  
Smartphone Application ◽  
Geographic Information ◽  
Urban Cycling ◽  
Accident Data ◽  
The Individual ◽  
Key Aspects ◽  
The City

Information on individual hazard perception while cycling and the associated feeling of safety are key aspects to foster sustainable urban cycling mobility. Although cyclist’s perceptions must also be critically reviewed, such crowdsourced Volunteered Geographic Information (VGI) provides wide-ranging insights on diverse hazard categories in cycling. In this case study in the city of Freiburg, Germany, hazard perceptions, information about lane types, and the underlying routes were crowdsourced via an open source smartphone application by a small group with the aim of providing cyclists with effective solutions. By dealing with levels of reliability, we show that even a small group of laypersons can generate an extensive and valuable set of VGI consisting of comprehensive hazard categories. We demonstrate that (1) certain hazards are interlinked to specific lane types, and (2) the individual hazard perceptions and objective parameters, i.e., accident data, are often congruent spatially; consequently, (3) dangerous hot spots can be derived. By considering cyclists’ needs, this approach outlines how a people-based perspective can supplement regional planning on the local scale.

Spatial Analysis and 3D Simulation of Underground Pipe Network Based on ArcGIS

2013 ◽  
Vol 353-356 ◽  
pp. 2948-2952
Author(s):  
Zheng Zhong Wu ◽  
Jun Ping Liu ◽  
Jing Jin ◽  
Hua Wang
Keyword(s):  
Spatial Data ◽  
3D Visualization ◽  
Three Dimensional ◽  
Pipe Network ◽  
Data Types ◽  
Underground Pipe ◽  
Digital Management ◽  
New Type ◽  
Spatial Data Model ◽  
The City

To resolve the problem that underground pipe network is large, complex, and difficult to manage, the management model based on ArcGIS was used. This paper aimed to transform the traditional data types of underground pipe network to a new type based on ArcGIS and to make statistical analysis and thematic maps output to the attribute datas for all underground pipes mainly including water supply network and drainage network. Through the analysis of pipe network visualization model implementation to build the spatial data model of three-dimensional pipe network, the automatic model from 2D to 3D would be achieved, then the new ways to realize the 3D visualization of urban underground pipe network would be provided. Taking the underground pipe network of a city as an example, the management system based on ArcGIS was built. The system running results show that the system could achieve the digital management of underground pipe network for the city and improve the management efficiency of the entire system.

scholarly journals 4D Building Information Modelling With Augmented Reality on Mobile Devices to Support Construction Management: Applications and key performance criteria from a stakeholder perspective

2021 ◽  
Author(s):  
◽  
Jay Vaai
Keyword(s):  
Project Management ◽  
Augmented Reality ◽  
Mobile Devices ◽  
Construction Management ◽  
3D Visualization ◽  
Three Dimensional ◽  
Performance Criteria ◽  
Building Industry ◽  
Structured Interviews ◽  
Building Information

<p>This research addresses the gap between construction project management and the 3D visualization of construction sequence. Typically project managers use software that presents construction stages as 2D Gantt charts, where the X axis represents time and the Y axis represents the construction activity. These are then typically cross referenced to either 2D or 3D construction drawings. The potential of linking construction sequencing charts and critical paths to Building Information Models is well established. So called ‘4D BIM’ applications such as Synchro enable the linking of three dimensional information and Gantt charts. There is also precedent in virtual reality simulations, such as the AR4BC project by (Woodward, Hakkarainen, & Rainio, 2010) and the desktop VR simulation applications for teaching construction management (Nikolic, 2006). From these and other precedents it is observed that 4D BIM is orientated towards the final stages of design where models are complex and not optimized, while full VR applications are typically not available in practice. Moreover, recent availability of augmented reality applications for mobile devices opens up new ways to integrate 4D BIM into project management. As part of initial discussions with consultants, a mock-up of an AR application running on a tablet that would enable on - site visualization was demonstrated. Given positive feedback, prototype applications were developed using the Unity interactive 3D authoring platform, which provides real time interaction between a Gantt chart and a 3D model. The final AR application uses a plan drawing as the marker and the user can switch between isometric and first person cameras to review construction sequencing, with the aim of identifying potential sequencing issues and / or clashes in the design while on site. The prototype interface and functionality have been evaluated through a series of structured interviews with building industry professionals. The results of these interviews have been analysed and from this, key performance criteria and guidelines for further development have been identified. This thesis illustrates the potential of AR on mobile devices for construction management, documents the design and implementation of a prototype application and articulates issues for further research from the perspective of key building industry stakeholders.</p>

Abbott, Edwin Abbott (1838–1926)

2018 ◽  
Author(s):  
Andrew Logemann
Keyword(s):  
Literary Criticism ◽  
Church Of England ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Biblical Studies ◽  
London School ◽  
Scholarly Output ◽  
Third Dimension ◽  
City Of London ◽  
The City

Edwin Abbott was born in London and educated at the City of London School and St. John’s College, Cambridge. He was ordained in the Church of England in 1863 and returned to the City of London School to serve as its headmaster from 1865–1889. He distinguished himself as a gifted teacher and scholar, publishing 54 books on topics ranging from theology and biblical studies to literary criticism and classics. Despite this prodigious scholarly output, Abbott is primarily known today for his single work of fiction, Flatland: A Romance of Many Dimensions (1884). This short novel offers both a strident satire of the gender inequities and class divisions of Victorian society and a deft popularization of the mathematics of four-dimensional space. In Flatland, a two-dimensional being’s discovery of the third dimension serves as an analogy for the three-dimensional audience’s encounter with a potential fourth dimension.

scholarly journals APPLICATION RESEARCH OF LOD TECHNOLOGY AND THE SHORTEST PATH ALGORITHM IN TRAFIC GEOGRAPHIC INFORMATION SYSTEM

2019 ◽  
Vol XLII-2/W13 ◽  
pp. 1369-1374
Author(s):  
X. Zhang ◽  
X. Zhang ◽  
H. Zhang
Keyword(s):  
Information System ◽  
Shortest Path ◽  
3D Visualization ◽  
Three Dimensional ◽  
Geographic Information ◽  
Vehicle Navigation ◽  
3D Gis ◽  
Shortest Path Algorithm ◽  
Visualization Technology ◽  
3D Information

<p><strong>Abstract.</strong> 3D visualization theory and technology has become a new research topic in the field of GIS and digital mapping. Based on a brief analysis of the development status of 3D GIS at home and abroad, this paper introduces the key technologies such as LOD technology and shortest path algorithm commonly used in traffic 3D GIS. The three-dimensional visualization technology in the application of traffic in the field of three-dimensional road network generation, vehicle navigation, simulation driving, etc., the analysis and summary of the vehicle collision model based on driving vehicles to detect road conditions and issue vehicle driving operation instructions, to some extent The simulated driving of the vehicle is realized. Based on the actual 3D geographic information platform, the fusion processing and 3D display of different precision terrain data are realized, and the function modules such as vehicle navigation and simulation driving are developed. The initial practice of LOD technology and shortest path algorithm in traffic 3D information system application was carried out.</p>

scholarly journals 3D virtual pathohistology of lung tissue from Covid-19 patients based on phase contrast X-ray tomography

eLife ◽  
2020 ◽  
Vol 9 ◽  
Author(s):  
Marina Eckermann ◽  
Jasper Frohn ◽  
Marius Reichardt ◽  
Markus Osterhoff ◽  
Michael Sprung ◽  
...  
Keyword(s):  
Lung Tissue ◽  
Phase Contrast ◽  
3D Visualization ◽  
Diffuse Alveolar Damage ◽  
Three Dimensional ◽  
Cone Beam ◽  
X Ray ◽  
Multi Scale ◽  
Beam Geometry ◽  
Third Dimension

We present a three-dimensional (3D) approach for virtual histology and histopathology based on multi-scale phase contrast x-ray tomography, and use this to investigate the parenchymal architecture of unstained lung tissue from patients who succumbed to Covid-19. Based on this first proof-of-concept study, we propose multi-scale phase contrast x-ray tomography as a tool to unravel the pathophysiology of Covid-19, extending conventional histology by a third dimension and allowing for full quantification of tissue remodeling. By combining parallel and cone beam geometry, autopsy samples with a maximum cross section of 8 mm are scanned and reconstructed at a resolution and image quality, which allows for the segmentation of individual cells. Using the zoom capability of the cone beam geometry, regions-of-interest are reconstructed with a minimum voxel size of 167 nm. We exemplify the capability of this approach by 3D visualization of diffuse alveolar damage (DAD) with its prominent hyaline membrane formation, by mapping the 3D distribution and density of lymphocytes infiltrating the tissue, and by providing histograms of characteristic distances from tissue interior to the closest air compartment.

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