User generated spatial content: an analysis of the phenomenon and its challenges for mapping agencies

Vyron Antoniou

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Geographic Information Systems Studies 3D Modeling in Geospatial Applications Mobile Crowdsensing and Crowdsourcing

Abstract

Since the World Wide Web (Web) became a medium to serve information, its impact on geographic information has been constantly growing. Today the evolution of the bi-directional Web 2.0 has created the phenomenon of User Generated Spatial Content. In this Thesis the focus is into analysing different aspects of this phenomenon from the perspective of a mapping agency and also developing methodologies for meeting the challenges revealed. \nIn this context two empirical studies are conducted. The first examines the spatial dimension of the popular Web 2.0 photo-sharing websites like Flickr, Panoramio, Picasa Web and Geograph, mainly investigating whether such Web applications can serve as sources of spatial content. The findings show that only Web applications that urge users to interact directly with spatial entities can serve as universal sources of spatial content. The second study looks into data quality issues of the OpenStreetMap, a popular wiki-based Web mapping application. Here the focus is on the positional accuracy and attribution quality of the user generated spatial entities. The research reveals that positional accuracy is fit for a number of purposes. On the other hand, the user contributed attributes suffer from inconsistencies. This is mainly due to the lack of a methodology that could help to the formalisation of the contribution process, and thus enhance the overall quality of the dataset. The Thesis explores a formalisation process through an XML Schema for remedying this problem. Finally, the advantages of using vector data in order to enhance interactivity and thus create more efficient and bi-directional Web 2.0 mapping applications is analysed and a new method for vector data transmission over the Web is presented.

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References

1989User Acceptance of Computer Technology: A Comparison of Two Theoretical Models 1970The Market for "Lemons": Quality Uncertainty and the Market Mechanism 1973Job Market Signaling 20124 What Is Web 2.0? Design Patterns and Business Models for the Next Generation of Software 2007Citizens as sensors: the world of volunteered geography 2010How Good is Volunteered Geographical Information? A Comparative Study of OpenStreetMap and Ordnance Survey Datasets 1953Elements of Cartography 2008The credibility of volunteered geographic information

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2017Quality Evaluation of Volunteered Geographic Information 2014Assessing the accuracy of openstreetmap data in south africa for the purpose of integrating it with authoritative data 2020Urban Consumption Patterns: OpenStreetMap Quality for Social Science Research 2017The Impact of the Contribution Micro-environment on Data Quality: The Case of OSM 2018Exploring the use of crowdsourced geographic information in defence: challenges and opportunities

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