[ncl-talk] Missing values mapping as black

[Rashed Mahmood]

Hi Barry,
I think the problem is setting this resource "res at cnFillColors" while not
setting cnFillPalette/*cnSpanFillPalette, see the docs for cnFillColors. *I
think using res at cnFillPalette = cmap, should be a better choice than
res at cnFillColors.

Cheers,
Rashed

On Wed, Feb 19, 2020 at 8:29 AM Barry Lynn via ncl-talk <ncl-talk at ucar.edu>
wrote:

> Actually, they may not be mapping as black.  I removed some more data and
> it became white.  However, something is mapping as black and I am not sure
> what it might be.
>
> On Wed, Feb 19, 2020 at 8:28 AM Barry Lynn <barry.h.lynn at gmail.com> wrote:
>
>> Hello:
>>
>> I added explicit labels to my color bar, as well as specifying the colors
>> I want. I added some geographical information for the map background.
>>
>>  Yet, I seem  to have a number of black squares, even though I set
>> missing values for all radar data less than 5 dbZ and I set
>>
>> res_ct at cnMissingValFillColor = "white" (or cmap (0,:)).
>>
>> as suggested on NCL-TALK.
>>
>> I tried both settings.
>>
>> I am not sure where the black squares are coming from.
>>
>> Thank you.
>>
>> On Tue, Feb 18, 2020 at 6:12 PM Barry Lynn <barry.h.lynn at gmail.com>
>> wrote:
>>
>>> Hello:
>>>
>>> For users who need to plot rectilinear data, I have attached the data
>>> and an ncl program to do so.
>>>
>>> Based on the NCL support pages, I was able to quickly put together the
>>> steps required to plot this data, including providing the data a long name,
>>> units, and coordinates. I also set the limits of the map over which to plot
>>> the data.
>>>
>>> I also created the latitude and longitude arrays from their starting and
>>> end points, and even reversed the latitudinal data since it was north to
>>> south instead of south to north.
>>>
>>> In other words, here's an easy template for doing everything you need to
>>> do to plot such data.
>>>
>>> I hope it helps someone...
>>>
>>> Barry
>>> --
>>> 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
>>>
>>>
>>
>> --
>> 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
>>
>>
>
> --
> 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
>
> _______________________________________________
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