[ncl-talk] A simple plot question (sort of)

[Barry Lynn]

HI Mary:

Thank you for your advice.

I found the answer on the web. It's a Lambert Conformal Grid...

http://www.ncl.ucar.edu/Applications/lcnative.shtml

On Mon, Nov 28, 2016 at 7:52 PM, Mary Haley <haley at ucar.edu> wrote:

> Hi Barry,
>
> If  plots are not displaying properly after they are overlaid on another,
> usually the first thing I suspect is that the two plots are not in the same
> data space.
>
> But first, is this data rectilinear? The reason I ask is that I see you
> are reading lat/lon off the file, but they are not used in the plotting.
> If you're not sure what I mean by rectilinear, please see the description
> at the top of this page:
>
> http://www.ncl.ucar.edu/Applications/plot_data_on_map.shtml
>
> Then, scroll down to the first example, which explains how to tell if your
> data is rectilinear or not.
>
> Your filled contours over the map are roughly in the range 10 to 60 lat,
> and -150 to -55 lon.  You didn't include the plot of the 700 mb contours,
> but I would look at the X/Y axis of the plot of this data to see what range
> it's in.  Also, if you look at your data with:
>
> printVarSummary(pett_fgen)
> printVarSummary(z_plane)
>
> this should provide information about coordinate arrays and their ranges,
> *if you have rectilinear data* This is another way to double-check that the
> two datasets are in the same data space.
>
> If you continue to have problems, can you email ncl-talk with the output
> results from the two printVarSummary statements, and also include the plot
> of z_plane?
>
> Thanks,
>
> --Mary
>
>
>
> On Tue, Nov 22, 2016 at 10:33 AM, Barry Lynn <barry.h.lynn at gmail.com>
> wrote:
>
>> Hello:
>>
>> I have moved away from using wrf interfaces for plotting and am simply
>> trying to plot relative humidity and height at 700 mb from the NAM data
>> (yesterday, Guido explained untangled my question about getting the
>> variables I needed from the files themselves).
>>
>> If I comment out overlay and draw(contour_fgen, below, and uncomment
>> draw(contour_z), I get a plot without any country/state line references,
>> but I get perfect 700 mb contours.
>>
>> However, if I run the program as is, I get only a single height line
>> superimposed on the relative humidity map (as shown).
>>
>> Clearly, something I have done is acting at cross purposes, but I various
>> tweaks I've made (adding/removing code) have not solved the problem.
>>
>> This may be a simple fix, but it would be nice to know what it is.
>>
>> Thank you.
>>
>>   overlay(contour_fgen,contour_z)
>>   draw(contour_fgen)   ; this will draw both the line and filled contours
>> over a map
>> ; draw(contour_z)   ; this will draw both the line and filled contours
>> over a map
>>
>>
>> --
>> Barry H. Lynn, Ph.D
>> Senior 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
>> US 914 432 3108
>>
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>>
>


-- 
Barry H. Lynn, Ph.D
Senior 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
US 914 432 3108
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