Re: Fill Value color transparent

From: Mary Haley <haley_at_nyahnyahspammersnyahnyah>
Date: Tue Nov 19 2013 - 10:00:43 MST

Hi Jonthan,

Without seeing your script, I'm not sure how you are doing the various overlays. By "NCL5" and "NCL6", I assume you mean NCL V5.1.2 and NCLV 6.1.2?

You can certainly make the fill value areas transparent, but you have to be using a cnFillMode of "AreaFill" (the default) or "CellFill", b/c in V6.1.2 and earlier, "RasterFill" doesn't support transparency.

See example 10 at:

In the next release of NCL, transparency will be supported with RasterFill.

If you want me to look into the issue between NCL 5.x and 6.x, then a script and data would help.



On Nov 19, 2013, at 7:17 AM, jbuzan <> wrote:

> Hello NCL–Talk,
> I am attempting to make spatial maps with the fill_value being transparent. I think something switched between NCL5 to NCL6, because I have not changed my plotting scripts. The goal is to overlay images close to each other for a presentation, however the white background in the NCL6 plots causes the data to be obscured. Is there a way to turn off the fillvalue/white background?
> Thanks,
> -Jonathan
> NCL5 plot
> <PastedGraphic-1.pdf>
> NCL6 plot
> <PastedGraphic-2.pdf>
> Example overlay obscuring data NCL6 plot.
> <Screen Shot 2013-11-19 at 9.15.01 AM.png>
> Example overlay not obscuring data, NCL5 plot
> <Screen Shot 2013-11-19 at 9.15.39 AM.png>
> _______________________________________________
> ncl-talk mailing list
> List instructions, subscriber options, unsubscribe:

ncl-talk mailing list
List instructions, subscriber options, unsubscribe:
Received on Tue Nov 19 10:00:54 2013

This archive was generated by hypermail 2.1.8 : Fri Nov 22 2013 - 09:36:32 MST