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When drawing in qgis i am encountering an error when drawing large polygons snapped to multiple points.

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Polygons that have this shading in certain areas are not displaying correctly in other platforms. If I grab one point and move it off the snapped point, there are no visible errors in the polygon.

Seems that the area is calculating correctly and check geometry validity returns no errors.

Does anyone know what is causing this error and how to fix it?

Thanks in advance!

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Bump, does anyone know what might be causing this? –  user21267 Sep 20 '13 at 0:06
    
I think you need to add more detail of what you are trying to do. I can't work out what the problem is. –  iant Sep 21 '13 at 17:11

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