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    Author
    Morris, Scott Howard
    Issue Date
    2010
    Keywords
    Computer Vision
    GPS
    Libraries
    Mapping
    Recreation Modeling
    Trails
    Advisor
    Barnard, Kobus
    Committee Chair
    Barnard, Kobus
    
    Metadata
    Show full item record
    Publisher
    The University of Arizona.
    Rights
    Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
    Abstract
    May your trails be crooked, winding, lonesome, dangerous, leading to the most amazing view. May your mountains rise into and above the clouds. Edward Abbey The digital representation of trails is a relatively new concept. Only in the last decade, with increasing adoption and accuracy of GPS technology, have large quantities of reliable data become a reality. However, the development of algorithms specific to processing digital trails has not had much attention. This dissertation presents a set of methods for collecting, improving and processing digital trails, laying the ground work for the science of trails.We first present a solution to the GPS-network problem, which determines the salient trails and structure of a trail network from a set of GPS tracklogs. This method has received significant attention from the industry and online GPS sharing sites, since it provides the basis for forming a digital library of trails from user submitted GPS tracks.A set of tracks through a GPS trail network further presents the opportunity to model and understand trail user behavior. Trail user models are useful to land managers faced with difficult management decisions. We present the K-history model, a probabilistic method for understanding and simulating trail user decisions based on GPS data. We use the K-history model to evaluate current simulation techniques and show how optimizing the number of historical decisions can lead to better predictive power.With collections of GPS trail data we can begin to learn what trails look like in aerial images. We present a statistical learning approach for automatically extracting trail data from aerial imagery, using GPS data to train our model. While the problem of recognizing relatively straight and well defined roads has been well studied in the literature, the more difficult problem of extracting trails has received no attention. We extensively test our method on a 2,500 mile trail, showing promise for obtaining digital trail data without the use of GPS.These methods present further possibilities for the study of trails and trail user behavior, resulting in increased opportunity for the outdoors lover, and more informed management of our natural areas.
    Type
    text
    Electronic Dissertation
    Degree Name
    Ph.D.
    Degree Level
    doctoral
    Degree Program
    Computer Science
    Graduate College
    Degree Grantor
    University of Arizona
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    Dissertations

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