A method for generating complex, evolving waveforms using a representation of a three-dimensional surface. The surface may be artificially constructed, or taken from actual geospatial data. To generate the wave, an imaginary traveller traverses an orbit, or closed path of some sort, about the terrain; a simple example is a circle about the surface's center or origin point. The traveller moves from point to point about the path, and at each point it moves to, the value of the output waveform is the elevation of the terrain at that point. One complete traversal of the path constitutes one cycle of the output waveform. Evolving waveforms are created by varying the path; for example, in the case of a circular path, the radius can be varied.

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