id,summary,reporter,owner,description,type,status,priority,milestone,component,version,severity,resolution,keywords,cc 554,Artifacts and limitations of bufferLineSingleSided,ylan,geos-devel@…,"Recently I implemented an algorithm that involves single-sided buffering of LineStrings and LinearRings. With testing I have encountered some limitations of the current implementation of the bufferLineSingleSided() function. 1) It does not accept LinearRings nor does it detect closeness of LineStrings. This may result in missing line segments in the buffered output, since it does not buffer the bit between the end and start point of the LineString. The advantage over buffering the LineString as a polygon (which sometimes gives the right result) is that this method can also give you an 'interior' buffer [[Image(http://share.ylan.nl/GEOS_bufferLineSingleSided.png)]] 2) Certain concavities in the LineString may create unwanted disconnected LineStrings in the buffer output. To illustrate this see the screenshot above (where green is the input and red is the single-sided buffer with a radius of 3). The artifacts appear in the top right. A hex-encoded WKB of the corresponding input LineString is attached.",defect,closed,major,3.4.0,Default,main,Unassigned,worksforme,,ylan