Asymmetric Polyline/Polygon Buffers

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Asymmetric Polyline/Polygon Buffers - improved

Author	Justin Johnson
File Name	buffers.zip
Language	Visual Basic
Last Modified	May 26 2004
Status of work	Public Domain
Software	ArcGIS Desktop
File Size	531.36 kb
Downloads	3595
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Summary
This code creates buffers around polylines or polygon boundaries with a different buffer distance for each side of the line. The code works by creating small polygons along the length of the polyline according to the buffer distances specified by the user. Rectangles are created for each segment, circular "pies" are created for each vertex, and full circles are made at each endpoint. These component polygons are then unioned into a single buffer polygon for each polyline. See the HTML document for an illustration of this procedure. This approach avoids the problems that were encountered in an earlier version of this script, which used the IConstructCurve:ConstructOffset method. That method sometimes produced non-simple geometries and left voids inside the buffers.