Basic Terrain Attributes

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Lecture 05 Digital Terrain Analysis I
Topics
Basic Terrain Attributes Viewshed Shaded relief
References
Zevenbergen and Thorne, 1987. Quantitative
analysis of surface topography, Earth Surface
Processes and Landforms, Vol. 12, pp.
47-56 Mitasova, H., and J. Hofierka, 1993.
Interpolation by regularized spline with
tension II. Application to terrain modeling
and surface geometry analysis, Mathematical
Geology, Vol. 25, pp. 657 - 669
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Lecture 05 Digital Terrain Analysis I
Outlines
1. Basic Terrain Attributes (The 3x3 DEM
kernel Figure) Slope gradient
(The Gradient Equation Figure) Slope aspect
(The Aspect Equation Figure) Profile
Curvature (The Profile Curvature
Equation Figure) Planform Curvature
(The Planform Curvature Equation Figure)
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2. Viewshed Analysis 1) What is a
viewshed 2) Line of Sight (The
Line of Sight Figure) 3) Viewshed Analysis
(The Viewshed Figure)
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3. Shaded relief (hill shading) (The Shaded
relief Figure in Burroughs) 1) What is
shaded relief map 2) Shaded relief
calculations a) Principle i.
orientation of a given surface
(slope gradient and slope aspect) ii.
a model of light reflection b)
Calculation (The shaded relief
calculation Figure)
Examples (The shaded relief
maps of Lubrecht)