I have committed the first version of a Plume tool. I decided that it was better to keep it separate from any kind of algorithm used to generate plumes. This version simply takes a LineString representing the center track of the plume, and a start and end radius. It produces a linear interpolation between the two end circles following the track that is really just a tapered buffer.
regards, Larry Becker -- http://amusingprogrammer.blogspot.com/
<<attachment: plume.jpg>>
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