[ncl-talk] Mysterious Map (Smaller Version)

Fri Nov 20 11:34:59 MST 2020

Hi Barry,
The issue I described only happens with contoured data. I have not seen
anything like that when using gsn_add_polymarker. Yes, for issues like this
I would try simplifying the coding to see if you can get the issue to go
away. And then, start adding sections of code back in until you see the
issue come back again. The simplest test would be: can you draw a blank map
using a minimal set of resources and add the polymarkers to the map? (
http://www.ncl.ucar.edu/Applications/maponly.shtml) But I would try
removing sections of code first (or in this case, remove some overlays) and
see if you can get the issue to resolve.
Best,
Adam

On Thu, Nov 19, 2020 at 8:36 PM Barry Lynn <barry.h.lynn at gmail.com> wrote:

> Hi Adam:
>
> Yes, it is convoluted.  Thank you for wading into it.
>
> I agree that is probably what is happening.  I've tested it before.  I
> thought that by using a raster plot it would solve the problem.
>
> A couple of key points.  I thought that I am not doing any contouring at
> all.  I am simply plotting points using "markid" as I needed to show points
> with lightning as much larger than the underlying grid domain.  Perhaps the
> key, then, is  to turn off contouring and shading in this resource?   I
> don't want to plot a false point.
>
> Barry
>
> On Fri, Nov 20, 2020 at 2:03 AM Adam Phillips <asphilli at ucar.edu> wrote:
>
>> Hi Barry,
>> I am having trouble following your graphing section, but I can tell you
>> that NCL (occasionally?) does not like it when a contour color field all
>> falls in one color bin. You can see if that is the issue by randomly
>> setting a point to a value of a different labelbar color bin. (So if all
>> your values are between 1 and 3, set a single point to 10 and see what
>> happens.) If that "fixes" things, then the before mentioned issue is the
>> problem. I have gotten around this by setting a grid point just off the
>> frame to a different color bin, but you may have to experiment.
>> Sorry I cannot be of more help.
>> Adam
>>
>> On Mon, Nov 16, 2020 at 9:30 PM Barry Lynn via ncl-talk <
>> ncl-talk at mailman.ucar.edu> wrote:
>>
>>> Due to size issues, my message was held up by the moderator.
>>>
>>> Here is a smaller version.
>>>
>>> I have never been able to figure this out.  I use cnRaster to make my
>>> lightning overlay.
>>>
>>> Yet, occasionally if the mapped values are the same value, I get a
>>> complete "greenwash" on the map.
>>>
>>> It's as if NCL can't map a single value to a few locations.
>>>
>>> The greenwash is being made by the "res@" resources.
>>>
>>> Does someone have a possible solution in mind?
>>>
>>> Thanks.
>>>
>>> ---------- Forwarded message ---------
>>> From: Barry Lynn <barry.h.lynn at gmail.com>
>>> Date: Sat, Nov 14, 2020 at 6:29 PM
>>> Subject: Fwd: A Mysterious Map
>>> To: ncl-talk <ncl-talk at ucar.edu>
>>>
>>>
>>> Here is a smaller sized version of what I just sent.
>>>
>>>
>>>
>>> Hi:
>>>
>>> I have never been able to figure this out.  I use cnRaster to make my
>>> lightning overlay.
>>>
>>> Yet, occasionally if the mapped values are the same value, I get a
>>> complete "greenwash" on the map.
>>>
>>> It's as if NCL can't map a single value to a few locations.
>>>
>>> The greenwash is being made by the "res@" resources.
>>>
>>> Does someone have a possible solution in mind?
>>>
>>> Thanks.
>>>
>>>
>>>
>>>
>>> --
>>> Guest Editor of Special Issue “Extreme Hydroclimatic Events and
>>> Prediction”
>>> LINK:
>>>
>>> https://www.mdpi.com/journal/water/special_issues/Extreme_Hydroclimatic_Events
>>>
>>> Barry H. Lynn, Ph.D
>>> Senior Associate Scientist, Lecturer,
>>> The Institute of the Earth Science,
>>> The Hebrew University of Jerusalem,
>>> Givat Ram, Jerusalem 91904, Israel
>>> Tel: 972 547 231 170
>>> Fax: (972)-25662581
>>>
>>> C.E.O, Weather It Is, LTD
>>> Weather and Climate Focus
>>> http://weather-it-is.com
>>> Jerusalem, Israel
>>> Local: 02 930 9525
>>> Cell: 054 7 231 170
>>> Int-IS: x972 2 930 9525
>>>
>>>
>>>
>>> --
>>> Guest Editor of Special Issue “Extreme Hydroclimatic Events and
>>> Prediction”
>>> LINK:
>>>
>>> https://www.mdpi.com/journal/water/special_issues/Extreme_Hydroclimatic_Events
>>>
>>> Barry H. Lynn, Ph.D
>>> Senior Associate Scientist, Lecturer,
>>> The Institute of the Earth Science,
>>> The Hebrew University of Jerusalem,
>>> Givat Ram, Jerusalem 91904, Israel
>>> Tel: 972 547 231 170
>>> Fax: (972)-25662581
>>>
>>> C.E.O, Weather It Is, LTD
>>> Weather and Climate Focus
>>> http://weather-it-is.com
>>> Jerusalem, Israel
>>> Local: 02 930 9525
>>> Cell: 054 7 231 170
>>> Int-IS: x972 2 930 9525
>>>
>>>
>>>
>>> --
>>> Guest Editor of Special Issue “Extreme Hydroclimatic Events and
>>> Prediction”
>>> LINK:
>>>
>>> https://www.mdpi.com/journal/water/special_issues/Extreme_Hydroclimatic_Events
>>>
>>> Barry H. Lynn, Ph.D
>>> Senior Associate Scientist, Lecturer,
>>> The Institute of the Earth Science,
>>> The Hebrew University of Jerusalem,
>>> Givat Ram, Jerusalem 91904, Israel
>>> Tel: 972 547 231 170
>>> Fax: (972)-25662581
>>>
>>> C.E.O, Weather It Is, LTD
>>> Weather and Climate Focus
>>> http://weather-it-is.com
>>> Jerusalem, Israel
>>> Local: 02 930 9525
>>> Cell: 054 7 231 170
>>> Int-IS: x972 2 930 9525
>>>
>>>
>>>
>>> --
>>> Guest Editor of Special Issue “Extreme Hydroclimatic Events and
>>> Prediction”
>>> LINK:
>>>
>>> https://www.mdpi.com/journal/water/special_issues/Extreme_Hydroclimatic_Events
>>>
>>> Barry H. Lynn, Ph.D
>>> Senior Associate Scientist, Lecturer,
>>> The Institute of the Earth Science,
>>> The Hebrew University of Jerusalem,
>>> Givat Ram, Jerusalem 91904, Israel
>>> Tel: 972 547 231 170
>>> Fax: (972)-25662581
>>>
>>> C.E.O, Weather It Is, LTD
>>> Weather and Climate Focus
>>> http://weather-it-is.com
>>> Jerusalem, Israel
>>> Local: 02 930 9525
>>> Cell: 054 7 231 170
>>> Int-IS: x972 2 930 9525
>>>
>>> _______________________________________________
>>> ncl-talk mailing list
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>>
>>
>>
>> --
>> Adam Phillips
>> Associate Scientist,  Climate and Global Dynamics Laboratory, NCAR
>> www.cgd.ucar.edu/staff/asphilli/   303-497-1726
>>
>> <http://www.cgd.ucar.edu/staff/asphilli>
>>
>
>
> --
> Guest Editor of Special Issue “Extreme Hydroclimatic Events and Prediction”
> LINK:
>
> https://www.mdpi.com/journal/water/special_issues/Extreme_Hydroclimatic_Events
>
> Barry H. Lynn, Ph.D
> Senior Associate Scientist, Lecturer,
> The Institute of the Earth Science,
> The Hebrew University of Jerusalem,
> Givat Ram, Jerusalem 91904, Israel
> Tel: 972 547 231 170
> Fax: (972)-25662581
>
> C.E.O, Weather It Is, LTD
> Weather and Climate Focus
> http://weather-it-is.com
> Jerusalem, Israel
> Local: 02 930 9525
> Cell: 054 7 231 170
> Int-IS: x972 2 930 9525
>
>

-- 
Adam Phillips
Associate Scientist,  Climate and Global Dynamics Laboratory, NCAR
www.cgd.ucar.edu/staff/asphilli/   303-497-1726

<http://www.cgd.ucar.edu/staff/asphilli>
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