Answers to: Residual Polygonshttps://help.openstreetmap.org/questions/27348/residual-polygons<p>Hi,</p>
<p>I am attempting to use JOSM and so far I have been using it successfully. I am using it in conjunction with <a href="http://sumo-sim.org/">SUMO</a>. However not so long ago I found a problem which has gotten me stuck. So help would be greatly appreciated!</p>
<p>I downloaded a map from OSM, left it as it is, used polyconvert (from SUMO), and it worked out fine.</p>
<p>Then I spent some time simplifying the map using JOSM. (Deleting and modifying some of the nodes and polygons which I found to be unnecessary for my project.) After doing so, I tried using polyconvert once again, and the following error popped up:</p>
<p>'Error: Polygon "(With polygon number)" has no shape.'</p>
<p>At first I thought that there were some extra polygons not specified in my file, so I intentionally left a single node in the file and tried using polyconvert again. And the same error arises!</p>
<p>Now for me, it is impossible to remove all the work I have done on the map and start over, as I spent many hours modifying it. Therefore the way I see it, there are two solutions (which I do not know how to do!).</p>
<p>1) Copy the deleted polygons from the original file.</p>
<p>2) Remove any possible residuals of the polygons which I deleted.</p>
<p>Obviously I prefer solution (2) but I do not know how to do it..any help would be immensely appreciated! Thanks!</p>enMon, 23 Jan 2023 08:59:40 +0000Answer by prapulhttps://help.openstreetmap.org/questions/27348/residual-polygons/86550<p>In polyconverter, you can use the option --ignore-errors as True</p>prapulMon, 23 Jan 2023 08:59:40 +0000https://help.openstreetmap.org/questions/27348/residual-polygons/86550