Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 19 of 19 for “"volunteered geographic information"”.
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Assessing Uncertainty in Volunteered Geographic Information for Emergency Response
This research project examines data produced by volunteers through the Ushahidi web platform in response to the earthquake that struck Haiti in January 2010. Volunteers translated messages submitted by victims in Haiti, categorized each message based on its content, and georeferenced each message …
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From Geo-Social to Geo-Local: The Flows and Biases of Volunteered Geographic Information
This dissertation analyzes the geography of information in the 21st century where BigData, social networks, user generated production of content and geography combine to create new and complex patterns of space, context and sociability. Both online and offline, social networks are creating a space …
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Credibility assessment of volunteered geographic information for emergency management: a Bayesian network modeling approach
An emerging paradigm of volunteered geographic information (VGI) in the field of Geography was resulted from recent advances of GPS equipped mobile devices such as the iPhone, and the amount of geographic information and its promptness has been dramatically increased with the participation of …
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Understanding patterns of outdoor recreation in Canadian parks using volunteered geographic information and big data
… managing ecosystem health and services. Volunteered geographic information (VGI) sources can provide researchers and management groups with valuable insights into human activity in these areas. In this thesis, I study how VGI sources can be used to estimate official visitation statistics …
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A Framework for and Design of a Smart Academic Building Using Sensors, Citizen Participation, and Volunteered Geographic Information
<p>Population growth and migration patterns have shown an influx of residents from rural to urban environments. To deal with the problems caused by unprecedented urban influx, cities should plan to use technology in a smart and distinctive way. Tackling at the city scale is hard. But a set of smart …
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Assessing the Functional Accuracy and Quality of Volunteered Geographic Information: A Comparison of Open Street Map and Navteq Road Datasets
… services due to a lack of sufficient attribute information on many of the roadways in the OSM dataset.</p>
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Geo-Analytics of Citizen-Government Interaction: The Integration of Spatial Data Mining, Volunteered Geographic Information (VGI), And Geovisualization To Explore Non-emergency Requests in the State of Kuwait
The rapid and continuous growth of population requires simultaneous provision of public services (or commons) at high spatial and temporal scales. In addition to the commons provision, governments are ought to maintain the commons to be at high quality standards. However, the rapid consumption of …
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Mapjack : a mobile based Wiki for collaborative map making
… to create, share and disseminate cartographic information. One of the best platforms that has empowered citizens to create cartographic data is OpenStreetMap. It has been ten years since OpenStreetMap came into existence and despite generating a large corpus of user contributed cartographic …
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Personalized route generation for Mountain Biking cycling based on the user’s profile
… route sharing tools. Most of these tools rely on Volunteered Geographic Information (VGI) both to acquire new trails for their databases and to rank them. While these tools are useful in most places, they can be of little to no help in regions with a smaller number of cyclists. This work proposes …
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Management of spatial data for visualization on mobile devices
… appropriate visualization quality. Using volunteered geographic information as a case-study, the framework shows exibility in delivering up-to-date spatial information from dynamic data sources. Three models of PT are designed and implemented to transmit the additional LoD re�nements: a …
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Social Media Geographic Information (SMGI): opportunities for spatial planning and governance
… from the use of social media platforms as an information resource for supporting design, analysis and decision-making in spatial planning. The widespread diffusion of Web 2.0 technologies and tools such as geobrowsers, Application Programming Interfaces (API), GPS-enabled mobile devices, and …
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Participants' motivations to contribute geographic information in an online community
This dissertation examines volunteered geographic information (VGI), a Web 2.0 phenomenon in which users contribute geographic information online and collaboratively create maps. By examining the case of www.openstreetmap.org, I clarify why people contribute geographic information to an online …
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Foundations for a Network Model of Destination Value Creation
… conducted. The panel data was created utilizing volunteered geographic information (VGI) obtained from 4.6 million photographs shared on Flickr. Results of econometric analysis indicate that both seasonal effects and DVS network structures have statistically significant relationships with total …
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Validating the Quality of Crowdsourced Data for Flood Modeling of Hurricane Harvey in Houston, Texas
… generate flood inundation maps. In these years, Volunteered Geographic Information (VGI) data such as social media and crowdsourced data arise as an alternative and supplementary data source to enhance the exercise of flood inundation mapping. However, compared to authoritative data acquired by …
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Assessing the accuracy of openstreetmap data in south africa for the purpose of integrating it with authoritative data
The introduction and success of Volunteered Geographic Information (VGI) has gained the interest of National Mapping Agencies (NMAs) worldwide. VGI is geographic information that is freely generated by non-experts and shared using VGI initiatives available on the Internet. The NMA of South Africa …
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The Complexities of Walking and Rolling: Using Crowdsourced Data to Understand and Analyze the Mobility Barriers Vulnerable Populations Experience as Pedestrians
Decades of vehicle dominated mobility policy has created streetscapes that endanger pedestrians. Pedestrian-vehicle collisions disproportionately impact older adults (aged 65+), with fatality rates three times higher than younger age groups. Similarly, factors such as episodic or permanent …