[ncl-talk] how to set the palette when plotting contour on contour

[Mary Haley]

Yi Lu,

I'm not sure how to get the 3D effect like the one you attached in the
example, but I'll ask one of our viz experts here to see if he's done this
kind of thing.

As for questions #2 and 3, please see example WRF_pcp_2.ncl (the last
example) at:

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

The trick is to use "cnFillPalette" to set the colormap for both the
terrain plot and the data plot, and then use the cnFillOpacityF resource to
a value less than 1 to get some transparency.

---Mary

On Mon, Sep 5, 2016 at 8:46 PM, 易路 <dg1225033 at smail.nju.edu.cn> wrote:

> Hi all,
>     I planed to use NCL to plot a TS evaluation matrix  under the
> background of terrian data following the image of example.png, which have a
> background of of terrian (look like three-dimensional as the color changed
> ) and overlay a countour with transparent colors. But the written script
> picture.ncl failed to display such picutre. So would you please help me
> check the script for the next problems?
>
> (1) how to set the palette of terrian plotting to make it look like
> three-dimension in grey color?  I used 100 grey RBG codes to form the
> palette, but the output picture  failed to display like that in the
> example.png.
>
> (2)how to set the palette of TS evaluation results to make it transparent
> and  able to display the terrian under them as in the example.png
>
> (3) the map projection was set to "LamberConformal" by applying the
> function of wrf_map_resources, but the map gridlines show in the
> rectangular not in the curvilinear, what are the reasons?
>
> The script and examplt iamge are uploaded in the accessary.
>
> Thanks very much for attention and precious time!
>
> Sincerely,
> Yi Lu
>
>
>
>
>
> 易路
>
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