[ncl-talk] margin top of viewport?

[MeteoBB]

Hi all,

to get space in top of the plot i tried to set the viewport parameters 
manually in NDC.

res at vpXF        = 0.2
res at vpYF        = 0.8
res at vpHeightF   = 0.3
res at vpWidthF    = 0.3

As you can see in die picture, the x-coordinate is correct (0.2).
But the y coordinate of the viewport isn't 0.8 (it is 0.784).
Why? Is that because of my lat/lon settings for the contour plot?
Any ideas?

Regards.

Am 19.02.2019 um 05:49 schrieb Rick Brownrigg:
> Hi,
>
> I have to wonder if you might have better luck trying your annotations 
> in NDC space. There are a number of functions named "gsn_XXX_ndc() 
> that operate in this coordinate system. The function "drawNDCGrid()" 
> can be helpful in understanding what's going on.
>
> http://ncl.ucar.edu/Document/Functions/Shea_util/drawNDCGrid.shtml
>
> HTH...
> Rick
>
> On Mon, Feb 18, 2019 at 5:26 PM MeteoBB <info at meteo-bb.de 
> <mailto:info at meteo-bb.de>> wrote:
>
>     Hi,
>
>     i have a map with a countur plot and want to add above the map a
>     box with some infos (see the attached pic).
>     Drawing the box is no problem, but when i turn off the MainString,
>     then there is no area left to draw my box, because the
>     map is slipping up. Yes, i could leave the MainTitle empty. But
>     this is not satisfying.
>
>     Tried setting:
>     *res at gsnBoxMargin = 0.05 *
>
>     seems to be a good start. But is there a resource only for a
>     margin-top?
>     Or do i have to set the viewport manually with *vpXF*,*vpYF*,
>     *vpWidthF*, *vpHeightF*?
>
>     Thanks.
>
>
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