[ncl-talk] Overlay contour on contour

[Mary Haley]

Ross,

If I understand your question correctly, I believe what you want to do is
use the "where" function to set your prec values to missing at values below
a certain level.

For example:

  prec = where(prec.le.0.1,prec at _FillValue,prec)

I've cleaned up your example to allow you to use the native lambert
projection parameters defined on your GRIB file.  You can set
USE_NATIVE_PROJ to False if you don't want this, and you will get the
original map projection you had.

See the attached plots and modified script.

--Mary



On Mon, May 29, 2017 at 1:09 PM, Roussan <rousslucas at gmail.com> wrote:

> Hello,
> I'm trying to overlay a map, and 2 differents contours.
>
> -Map
> -Cloud cover
> -Precipitations
>
> I can't achieve that without seting "prec_res at cnFillOpacityF" below 1
> (line  98 of my script), but legend colors become untrue.
>
> if I comment "prec_res at cnFillOpacityF" I only can see map and
> precipitations,
> but no clouds.
>
> I would like to fully plot precipitations over clouds and map,
> without alter legends colors.
>
> Thanks in advance for your help.
> Ross
>
>  PS : script + grib2 in attachement.
>
>
>
>
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