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<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:windowtext">We have been happily using rgdal to read and write ESRI Shapefiles. Recently my colleague began using it. We noticed that after saving and reopening files,
many polygons had been reconfigured, as if the order of the vertices had become jumbled and there were many straight lines cutting across the polygon. I’m not sure if an image can be pasted in this list but I’ll try.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:windowtext">I did the same thing on my computer and the problem did not occur. We found that I had an older version of rgdal, 1.0-7. When I updated it to 1.1-1, the
problem occurred just as it had with her.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:windowtext">Simply opening and saving a shapefile causes the problem and essentially jumbles the shapefile. The bug, if it is one, was introduced after 1.0-7<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:windowtext">I will attach images of one complex polygon, before and after saving with writeOGR.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:windowtext">Jim<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:windowtext"><o:p> </o:p></span></p>
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