MyqueWooMiddo commented on issue #2137:
URL: https://github.com/apache/sedona/issues/2137#issuecomment-3105355753

   IN org.apache.sedona.common.Functions.lineMerge
   when (merger.getMergedLineStrings().size() > 1) , the output may be multiple 
separate linestrings belongs to the merger result,
   it makes mistake when return the input geometry :
   
   else {
           // if the merger couldn't join the lines, it will contain the 
individual lines, so return
           // the input
           return geometry;
         }
   
   =>>
   
   else {
           Object[] mergedlinestrings =   
merger.getMergedLineStrings().toArray(new LineString[]{});
           MultiLineString multiLineString = 
geometry.getFactory().createMultiLineString((LineString[]) mergedlinestrings);
           return multiLineString;
         }


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