<div dir="ltr">Thanks! I might dig into this further to see if I can find a series of steps to mitigate this. Will update if I find anything.</div><br><div class="gmail_quote"><div dir="ltr">On Mon, Jan 18, 2016 at 5:44 PM 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"><div style="word-wrap:break-word"><div>
<div>On Jan 18, 2016, at 3:56 PM, Michael Mase <<a href="mailto:masester@gmail.com" target="_blank">masester@gmail.com</a>> wrote:</div>
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<blockquote type="cite">Thanks, Jennifer! This is very helpful. I'm interested to learn more why GrADS can't export with rings.</blockquote>
</div></div><div style="word-wrap:break-word"><div><a href="http://cola.gmu.edu/grads/gadoc/shapefiles.html#caveat" target="_blank">http://cola.gmu.edu/grads/gadoc/shapefiles.html#caveat</a></div></div><div style="word-wrap:break-word">
<div>—Jennifer</div></div><div style="word-wrap:break-word">
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<blockquote type="cite">I've used degrib a few times and it seems to do this beautifully. However, it relies on the GRIB data being in the final state - which makes GrADS more appealing.
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<div dir="ltr">On Mon, Jan 18, 2016 at 3:52 PM Jennifer M Adams <<a href="mailto:jadams21@gmu.edu" target="_blank">jadams21@gmu.edu</a>> wrote:<br>
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<div style="word-wrap:break-word">The polygons in a Grads-generated shapefile conform to the ESRI specifications (<a href="https://www.esri.com/library/whitepapers/pdfs/shapefile.pdf" target="_blank">https://www.esri.com/library/whitepapers/pdfs/shapefile.pdf</a>)
but have an additional constraint so that GrADS will render them properly: no rings, a.k.a. polygons within other polygons, a.k.a. “donuts". For this reason, the filled contours are are sliced up into odd-looking polygons that you can see clearly if you draw
them individually, or with an outline color that does not match the fill color. There is nothing to be done about that on the GrADS side. There are probably some GIS tools that will merge polygons, but if you want a smooth-looking and outlined filled contour
plot, write out the polygons and line contours into two separate shapefiles and overlay them. —Jennifer
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<div>On Jan 18, 2016, at 2:08 PM, Michael Mase <<a href="mailto:masester@gmail.com" target="_blank">masester@gmail.com</a>> wrote:</div>
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<div style="white-space:pre-wrap">Exporting shapefiles works fantastic when using lines. However, when you export using polygons, you get very broken and disconnected shapes</div>
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Does anyone have any advice on writing/exporting solid shapefiles that have joined multi-polygons (for each contour region; each temperature interval, for example)?<br>
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It would be nice if each polygon layer represented each interval on the map and was nicely joined and closed properly.
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<div style="font-size:12px">Jennifer M. Adams<br>
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George Mason University<br>
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111 Research Hall, Mail Stop 2B3<br>
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