<div dir="ltr">Thanks, Jennifer. That makes sense. I'm wondering if there is a practical way outside of GrADS to transform the exported shapefile to this desired result. If you have any ideas, I would love to hear them. I may dig in to see if I can find a practical way to do this and perhaps it could be added as a hint to the documentation if you so wish.<div><br></div><div>Thanks again!</div><div><br></div><div>Mike</div></div><br><div class="gmail_quote"><div dir="ltr">On Sat, Sep 16, 2017 at 11:24 AM Jennifer M Adams <<a href="mailto:jadams21@gmu.edu">jadams21@gmu.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi, Mike —<br>
It is likely that the caveat will remain a feature in GrADS — even if we did not draw the inner rings, filling in the outer ring will always cover the entire area, and the area inside the inner rings could not be undrawn. A corrollary of the caveat is that shapefiles exported from GrADS will never have inner rings — the shading algorithm is specifically designed to avoid this problem. It would certainly have been easier to export closed contours as polygons with inner rings, but then GrADS would not have been able to display its own shapefiles properly.<br>
<br>
The workaround for the caveat is to rewrite the shapefile so that the polygons do not have inner rings; the boundary points would include the inner and outer rings with an overlapping line that connects the two rings.<br>
—Jennifer<br>
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<br>
> On Sep 15, 2017, at 11:10 AM, Michael Mase <<a href="mailto:masester@gmail.com" target="_blank">masester@gmail.com</a>> wrote:<br>
><br>
> Hi there,<br>
><br>
> Just wondering if the latest GrADS version supports exporting shapefiles with inner rings now or if there are plans to support this in the future?<br>
><br>
> Thanks,<br>
> Mike<br>
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--<br>
Jennifer Miletta Adams<br>
Center for Ocean-Land-Atmosphere Studies (COLA)<br>
George Mason University<br>
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