[ncl-talk] Missing values mapping as black

Wed Feb 19 06:38:33 MST 2020

So, perhaps there is a problem (bug) in the code or description.

On Wed, Feb 19, 2020 at 3:37 PM Barry Lynn <barry.h.lynn at gmail.com> wrote:

> 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
>>>>>
>>>>> _______________________________________________
>>>>> ncl-talk mailing list
>>>>> ncl-talk at ucar.edu
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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
>
>

-- 
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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