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An Egocentric Spatial Data Model For Intelligent Mobile Geographic Information Systems, Christopher E. Frank Dec 2003

An Egocentric Spatial Data Model For Intelligent Mobile Geographic Information Systems, Christopher E. Frank

Electronic Theses and Dissertations

Individuals in unknown locations, such as utility workers in the field, soldiers on a mission, or sightseeing tourists, share the need for an answer to two basic questions: "Where am I?" and "What is in front of me?Because such information is not readily available in foreign locations, aids in the form of paper maps or mobile GISs, which give individuals an all-inclusive view of the environment, are often used. This panoptic view may hinder the positioning and orienteering process, since people perceive their surroundings perspectively from their current position. In this thesis, I describe a novel framework that resolves ...


Perceptual Sketch Interpretation, Markus Wuersch Dec 2003

Perceptual Sketch Interpretation, Markus Wuersch

Electronic Theses and Dissertations

Sketching is a creative form of describing a spatial scene. People perceive such a scene in a straight forward way and build a mental model of the objects contained in a sketch. Whereas these objects might be regions, a sketch only contains lines and, therefore, developing automated sketch interpretation means outlining a rationale to grouping lines according to the objects they belong to. Automated sketch interpretation allows efficient processing of sketches. Labor intensive manual extraction could be brought to a minimum and, therefore, spatial data in form of sketches and spatial information extracted from sketches would be available more readily ...


Public Commons For Geospatial Data: A Conceptual Model, Chakravarthy Namindi Sharad Aug 2003

Public Commons For Geospatial Data: A Conceptual Model, Chakravarthy Namindi Sharad

Electronic Theses and Dissertations

A wide variety of spatial data collection efforts are ongoing throughout local, state and federal agencies, private firms and non-profit organizations. Each effort is established for a different purpose but organizations and individuals often collect and maintain the same or similar information. The United States federal government has undertaken many initiatives such as the National Spatial Data Infrastructure, the National Map and Geospatial One-Stop to reduce duplicative spatial data collection and promote the coordinated use, sharing, and dissemination of spatial data nationwide. A key premise in most of these initiatives is that no national government will be able to gather ...


User Controlled Privacy Protection In Location-Based Services, Anuket Bhaduri Aug 2003

User Controlled Privacy Protection In Location-Based Services, Anuket Bhaduri

Electronic Theses and Dissertations

The rapid development of location-determining technologies has enabled tracking of people or objects more accurately than ever before and the volume and extent of tracking has increased dramatically over time. Within the broader domain of tracking technologies, location-based services (LBS) are a subset of capabilities that allow users to access information relative to their own physical location. However, the personal location information generated by such technologies is at risk of being misused or abused unless protection capabilities are built into the design of such systems. These concerns may ultimately prevent society from achieving the broad range of benefits that otherwise ...


Spatial Aspects Of Metaphors For Information: Implications For Polycentric System Design, Paul Charles Schroeder Aug 2003

Spatial Aspects Of Metaphors For Information: Implications For Polycentric System Design, Paul Charles Schroeder

Electronic Theses and Dissertations

This dissertation presents three innovations that suggest an alternative approach to structuring information systems: a multidimensional heuristic workspace, a resonance metaphor for information, and a question-centered approach to structuring information relations. Motivated by the need for space to establish a question-centered learning environment, a heuristic workspace has been designed. Both the question-centered approach to information system design and the workspace have been conceived with the resonance metaphor in mind. This research stemmed from a set of questions aimed at learning how spatial concepts and related factors including geography may play a role in information sharing and public information access. In ...


People In Nature: Environmental History Of The Kennebec River, Maine, Daniel J. Michor Jan 2003

People In Nature: Environmental History Of The Kennebec River, Maine, Daniel J. Michor

Electronic Theses and Dissertations

The quality of a river affects the tributaries, lakes, and estuary it feeds; it affects the wildlife and vegetation that depend on the river for energy, nutrients, and habitat, and also affects the human community in the form of use, access, pride, and sustainability. In an age of mass consumerism and materialism, dwindling natural resources and wild spaces, and advanced technology, the ability to make a living and at the same time enjoy the benefits of rural living is increasingly difficult. Using the entire Kennebec River watershed as the scale of investigation with particular focus on the river corridor itself ...


The Rogues Of 'Quoddy: Smuggling In The Maine New Brunswick Borderlands 1783-1820, Joshua M. Smith Jan 2003

The Rogues Of 'Quoddy: Smuggling In The Maine New Brunswick Borderlands 1783-1820, Joshua M. Smith

Electronic Theses and Dissertations

Smuggling has been an important problem in American-Canadian relations. Yet the nature of smuggling is little understood; it is by definition an elusive, secretive, and subtle practice. This dissertation explores smuggling as a social force within a border community on the United States-Canada boundary. Smuggling almost always involved the illicit crossing of political boundaries, and as such can be used as a means of studying popular attitudes toward the creation of national borders. Moreover, because smuggling is directly related to the transition to modem capitalism, this study sheds light on the roots of both American and Canadian economic development. The ...