1. Lecture 05: Digital Terrain Analysis I
Topics:
Basic Terrain Attributes
Viewshed
Shaded relief
References:
Zevenbergen and Thorne, “Quantitative analysis of
surface topography”, Earth Surface Processes
and Landforms, Vol. 12, pp
Mitasova, H., and J. Hofierka, “Interpolation by
regularized spline with tension: II. Application to terrain
modeling and surface geometry analysis”, Mathematical
Geology, Vol. 25, pp

2. 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)

3. 2. Viewshed Analysis:
1) What is a viewshed:
2) Line of Sight:
(The Line of Sight Figure)
3) Viewshed Analysis:
(The Viewshed Figure)

4. 3. Shaded relief (hill shading):
(The Shaded relief Figure in Burrough’s)
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)