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Digital slope-aspect display using nearly continuous hue classes

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https://ir.library.oregonstate.edu/concern/graduate_projects/sq87bv21p

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  • Slope-aspect is the compass direction of a slope at a particular location on a given surface, and can provide a graphic tool for people who require an understanding of the pattern of slope-aspect variation across a landscape. Slope-aspect maps can be helpful for terrain analysis, watershed management, building site analysis, solar access planning, and other activities that use slope direction information. Due to the complexity of this information, most slope-aspect maps are created on computers using computations based on grid cells in a digital elevation model (DEM), which determines for each pixel the aspect azimuth and aspect class. This digital slope-aspect map can then be displayed on a color CR1 (Cathode Ray Tube) or a hardcopy device. The design challenge for slope-aspect mapping is to create a visually effective color progression for the computed aspect azimuths. In the past, various attempts have used visually different hues to distinguish slope direction, but did not use a visually systematic progression to show the underlying landscape. The object of this research paper is to develop a mathematical coloring scheme that maximizes color contrast among slope-aspect, and also allows the user to easily visualize the landscape relief.
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  • File scanned at 300 ppi (Monochrome, 256 Grayscale) using Capture Perfect 3.0 on a Canon DR-9050C in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
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