Date: Mon Feb 13 2012 - 10:03:29 MST
Hi Kyle,
See example #6 here:
http://www.ncl.ucar.edu/Applications/contourLab.shtml#ex6
You need to set cnLabelMasking = True
I attached a plot that shows what that resource does when you overlay a
contour plot on a filled-contour plot. I believe this is the behavior
you were looking for. If not, let ncl-talk know.
Adam
On 02/13/2012 09:42 AM, Kyle Griffin wrote:
> Apologies...the first link in my email should be as below...
>
> http://www.atmos.albany.edu/student/kgriffin/maps/6hrprecip_namer_55.png
> -----------------------------------------------------
> Kyle S. Griffin
> Dept. of Atmospheric and Environmental Sciences
> University at Albany, SUNY
> 1400 Washington Ave, Albany, NY 12222
> Office: ES-218 Email: kgriffin@atmos.albany.edu
> <mailto:kgriffin@atmos.albany.edu>
> http://www.atmos.albany.edu/student/kgriffin/
>
>
>
> ---------- Forwarded message ----------
> From: *Kyle Griffin* <kgriffin@atmos.albany.edu
> <mailto:kgriffin@atmos.albany.edu>>
> Date: Mon, Feb 13, 2012 at 11:35 AM
> Subject: cnLineLabelBackgroundColor behavior
> To: ncl-talk@ucar.edu <mailto:ncl-talk@ucar.edu>
>
>
> Hello...
>
> After quite a bit of exploring and experimenting, I have been unable
> to find a method to edit line label background colors so they behave
> in a manner similar to GEMPAK, which many users find to
> be aesthetically pleasing. Specifically, if a line is contoured on top
> of a fill, its line labels have two options: either be color filled
> and blocking out all useful data behind the line label, or be
> transparent, where the label becomes essentially unreadable due to the
> fact that the line does not break around its own labels. You can find
> an example of both of these behaviors at:
>
> http://www.atmos.albany.edu/student/kgriffin/maps/6hrprecip/6hrprecip_namer_55.png
>
> where the black lines (MSLP) are labeled with background color = -1
> (transparent) and the 850 hPa temperature lines (dotted, various
> colors) are labeled with background color = 0 (white). The labels on
> MSLP contours are virtually unreadable everywhere, whereas the labels
> on temperature contours are readable due to their white boxes, but
> block out all data (filled or contoured) beneath them.
>
> What I'm hoping to find is a method where the
> cnLineLabelBackgroundColor = -1 will serve to create a transparent box
> around the label which allows data underneath the label to be visible
> while still breaking/hiding the contour that is being labeled. For an
> example of this type of behavior, see:
>
> http://www.atmos.albany.edu/student/kgriffin/maps/6hrprecip/6hrprecip_namer_55.gif
>
> You'll notice all of the contours are broken around their respective
> lines and let the data underneath remain visible. Is there a way to do
> this with NCL? It would make visualization and labeling of all plot
> types (not just horizontal maps) look quite nicer.
>
> Thanks,
>
>
> Kyle
> -----------------------------------------------------
> Kyle S. Griffin
> Dept. of Atmospheric and Environmental Sciences
> University at Albany, SUNY
> 1400 Washington Ave, Albany, NY 12222
> Office: ES-218 Email: kgriffin@atmos.albany.edu
> <mailto:kgriffin@atmos.albany.edu>
> http://www.atmos.albany.edu/student/kgriffin/
>
>
>
>
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-- ______________________________________________________________ Adam Phillips asphilli@ucar.edu NCAR/Climate and Global Dynamics Division (303) 497-1726 P.O. Box 3000 Boulder, CO 80307-3000 http://www.cgd.ucar.edu/cas/asphilli
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