[ncl-talk] Filled polygon on xyplot causes postscript file error on opening

[Rick Brownrigg]

Hi,

That's indeed odd. Does it happen only with postscript output?  Would you
be able to send me your script/data so that I can observe the exact
behavior?

Rick


On Mon, Apr 30, 2018 at 12:26 AM, Tess Parker <tess.parker at monash.edu>
wrote:

> I'm having an issue drawing a filled polygon on an xy line plot. The error
> seems to be related to the size of the polygon somehow.
>
> Although my script dynamically determines the x and y coordinates of the
> polygon, and executes correctly with smaller polygons, I encounter an error
> with larger polygons. The NCL script completes without any error messages,
> but on opening the .eps file using MacOS and Preview, no .pdf is produced
> in Preview.
>
> I've tried running exactly the same script for various instances, and
> smaller polygons run without problems. When I manually change the x and y
> coordinates of the larger polygon, where the error was encountered, the
> problem goes away.
>
> Is there some maximum limit to the size of a filled polygon? - I can't
> find any reference to this online...
>
> I basically have an xy plot with y-axis values from 0 - 6500, and x-axis
> values from 280 - 330, and a couple of lines plotted using gsn_csm_xy. If
> the polygon is drawn on this plot using
> *polyres = True*
> *polyres at gsFillColor  = "lightblue1"*
> *polyres at tfPolyDrawOrder = "PreDraw"*
> *polyres at gsFillOpacityF  = 0.2*
> *dummy = new(1,graphic)*
> *dummy =
> gsn_add_polygon(wks,plot,(/280.0,330.0,330.0,280.0,280.0/),(/2815,2815,826,826,2815/),polyres)*
> the plot fails to open a .pdf from the .eps file. (I use "PreDraw" so that
> the shading underlies the line plots.)
>
> If I alter the y-coordinates to (/1815,1815,826,826,1815/) then there is
> no problem.
>
> Any ideas?
>
> Many thanks,
> Tess
>
> --
> Dr Tess Parker
> Research Fellow
> School of Earth, Atmosphere and Environment
> Room 232, Building 28
> 9 Rainforest Walk
> Monash University, Clayton VIC 3800
>
> http://users.monash.edu.au/~tess/index.html
>
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