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 6 of 6 for “"Polygon Area"”.
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Effect of manual digitizing error on the accuracy and precision of polygon area and line length
… to evaluate the effect digitizing error had upon polygon size and total line length at varying map accuracy standards. Digitizing error produced no bias in polygon area. The standard deviation of polygon area doubled as the accuracy standard bandwidth doubled, but the standard deviation was always …
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Statistical characterization of area and distance in arc-node geographic information systems
… resources data, estimates of the reliability of area and distance measures computed in GIS have been lacking. Using fairly weak assumptions regarding the variability of point location errors, expressions for computing the mean, variance and covariance of polygon area, and an approximate …
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Single digital-photo correction for a GIS application and error analysis
… maps and by USGS 7.5-minute DEMs of two study areas, Prentiss, North Carolina and Blacksburg, Virginia. The collinearity equations were used to remove geometric errors caused by image tilt and relief, displacement. In addition to the study of geometric error in uncorrected and corrected digital …
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Rapidly Estimating Swarm Resource Needs Through Autonomous Simulation
… visit each portion of the mission operating area (grid idle time) and how much area each robot controls (average Voronoi polygon area). With a common patrol scenario developed, this thesis then simulates patrol missions using different vehicle and depot parameters to generate a broad …
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Evaluating methods for characterizing slope conditions within polygons
… determining and characterizing slope values in polygons and how these methods affect natural resource models. Eight different previously used methods for determining cell slope values were compared using elevation data from the USGS Big Stone Gap, Virginia, Digital Elevation Model. The 28 …
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Validation of Criteria Used to Predict Warfarin Dosing Decisions
… decisions (considered the "gold standard"). The area between the criteria method spline and the gold standard method spline served as the comparison, using bootstrapping for statistical inference. Although some of the criteria methods performed better than others, none of them matched the gold …