Contouring Examples Start with imaginary landscape, then select 40 points at random off it Examples of: Hand contouring Triangulation-based contouring.

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Presentation transcript:

Contouring Examples Start with imaginary landscape, then select 40 points at random off it Examples of: Hand contouring Triangulation-based contouring Block average contouring Surface fitting contouring Surface fitting “under tension” contouring

Example

Example

Spline Example http://www.cse.unsw.edu.au/~lambert/splines/natcubic.html

Source Data Map

Elevations

Hand Contouring

Triangulation (pscontour)

Source Data Map

Triangulation (pscontour)

Averaging (nearneighbor)

Elevations

Source Data Map

Spline (surface, Tension = 0)

Spline (surface, Tension = 0.35)

Source Data Map

Spline (surface, Tension = 0.35, 10 ft. contours)

Spline (surface, Tension = 0, 20 ft. contours)

Source Data Map

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