[ncl-talk] Missing values mapping as black

[Barry Lynn]

Okay, I misunderstood and now I am clarifying.


I just tried:


res at cnFillOn     = True


and commented out this line:


; res at cnLinesOn = False


and the contours reappeared.






On Wed, Feb 19, 2020 at 3:30 PM Barry Lynn <barry.h.lynn at gmail.com> wrote:

> Yes, you are correct. As I mentioned, I turned off contouring and the
> problem went away.
>
> Barry
>
> On Wed, Feb 19, 2020 at 3:02 PM Rick Brownrigg <brownrig at ucar.edu> wrote:
>
>> Hi,
>>
>> Looking at that plot, it looks almost as though some sort of line work,
>> such as contour lines, is being drawn and obscuring the underlying filled
>> areas (?)  I know that shouldn't be the case, because the docs for
>> cnLinesOn state:
>>
>>    "Default: True (False for gsn_csm contour
>> <http://ncl.ucar.edu/Document/Graphics/Interfaces/> routines when
>> contour fill is turned on.)"
>>
>> but that's what it *looks* like..
>>
>> FWIW...
>> RIck
>>
>>
>> On Wed, Feb 19, 2020 at 12:55 AM Rashed Mahmood via ncl-talk <
>> ncl-talk at ucar.edu> wrote:
>>
>>> 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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>>>
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>>
>>
>
> --
> 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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