[ncl-talk] Missing values mapping as black

[Rick Brownrigg]

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
>> List instructions, subscriber options, unsubscribe:
>> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>
> _______________________________________________
> ncl-talk mailing list
> ncl-talk at ucar.edu
> List instructions, subscriber options, unsubscribe:
> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.ucar.edu/pipermail/ncl-talk/attachments/20200219/114de068/attachment.html>