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Douglas-Peucker Generalization Algorithm for simplifying 2D & 3D polylines and polygons

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Submitted on: 2/15/2015 6:15:00 AM
By: Stavros (from psc cd)  
Level: Intermediate
User Rating: By 18 Users
Compatibility: VB 6.0
Views: 6824
 
     The process of generalization is normally executed when the map scale has to be reduced. Another usage is in cleaning up noisy representations of polylines, possibly generated by a raster-to-vector conversion (tracing). Generalization can be seen as a form of lossy data compression; given a large and complicated object, we seek to simplify it by reducing detail. Ideally, we obtain a polyline/polygon with far fewer vertices that looks essentially the same at a target scale. This can be a big win in computer graphics, where replacing a large model with a smaller one might have little visual impact but require significantly less storage space and rendering time.

 

Windows API/Global Declarations:

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'Windows API/Global Declarations for :Douglas-Peucker Generalization Algorithm for simplifying 2D & 3D polylines and polygons
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gdi32, kernel32
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