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You need to delete _FillValue and set the number to some arbitrary value.
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<div class="">-Jonathan</div>
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<div class="">On Jul 2, 2020, at 8:55 PM, Rashed Mahmood <<a href="mailto:rashidcomsis@gmail.com" class="">rashidcomsis@gmail.com</a>> wrote:</div>
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<div class="">I do not think that we should use 0 as missing value, please also see this page:</div>
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<div class="">and no, setting _FillValue to some arbitrary number does not work.</div>
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<div class="">I am guessing that there may be a workaround for this, which I haven't found yet!</div>
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<div dir="ltr" class="gmail_attr">On Wed, Jul 1, 2020 at 7:06 PM Buzan, Jonathan <<a href="mailto:jbuzan@purdue.edu" class="">jbuzan@purdue.edu</a>> wrote:<br class="">
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<div style="overflow-wrap: break-word;" class="">I think it’s interpolating between the data.
<div class="">Have you tried deleting the _FillValue and set it to 0 (or some arbitrary number)?</div>
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<div class="">-Jonathan</div>
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<div class="">On Jul 1, 2020, at 6:25 PM, Rashed Mahmood <<a href="mailto:rashidcomsis@gmail.com" target="_blank" class="">rashidcomsis@gmail.com</a>> wrote:</div>
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<div class="">Jonathan,</div>
<div class="">Please look at the if statement that was introduced just to play with it a bit. Please have a look at the plot named *_Original.pdf. This is what the question is about.</div>
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<div class="">Rashed<br class="">
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<div dir="ltr" class="gmail_attr">On Wed, Jul 1, 2020 at 6:03 PM Buzan, Jonathan <<a href="mailto:jbuzan@purdue.edu" target="_blank" class="">jbuzan@purdue.edu</a>> wrote:<br class="">
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Hi Rashed,<br class="">
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Looking at your script, it looks like the stipple is doing exactly what you said it to do:<br class="">
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do n=0,20 <br class="">
sig({n},:) = 95.01<br class="">
end do<br class="">
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You set resS@cnLevels =(/ 95.,100. /)<br class="">
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The {n} in sig({n},:) means to set the latitudes 0-20 to 95.01. And the stipple is greater than 95. But lower than 100. So it stippled from 0-20 latitude.<br class="">
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-Jonathan<br class="">
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> On Jul 1, 2020, at 5:57 PM, Rashed Mahmood via ncl-talk <<a href="mailto:ncl-talk@mailman.ucar.edu" target="_blank" class="">ncl-talk@mailman.ucar.edu</a>> wrote:<br class="">
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> Hi NCL,<br class="">
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> I encountered strange stippling behaviour when valid data points are very few and are scattered apart from each other. At best I would expect no stippling overlaid on a filled map, however, it seems that NCL somehow covers the whole map with stippling.<br class="">
> <br class="">
> To explain this, I created a small example script (attached) which reads data from the attached file. To play with it a bit, I just added some "fake data" to see what happens. In the script we could set it using "add_bogus_data = True".<br class="">
> Attached are two plots after using original data and adding some fake data. I am not sure what is going on here, anyone? Ignore the file names!!<br class="">
> <br class="">
> Cheers<br class="">
> Rashed<br class="">
> <br class="">
> <funny_stiple.ncl><<a href="http://tst_diff.nc/" rel="noreferrer" target="_blank" class="">tst_diff.nc</a>><Mask_TEST_Original.pdf><Mask_TEST_Bogus.pdf>_______________________________________________<br class="">
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