Re: [ferret_users] Odd lines on postscript with fill command

["William S. Kessler" <william.s.kessler@xxxxxxxx>]

I believe those lines show the edges of the blocks the contour  
calculation works in. (The algorithm dates from 1968, and does the  
work in small chunks to save memory). The boundaries are supposed to  
be zero thickness and invisible.

In my experience, this is a problem only with certain postscript/pdf  
viewers. I have seen it frequently in Mac Preview, but the same plot  
will look fine in Acrobat.

But if SHADE avoids the problem, a workaround could be to first  
SHADE, then FILL/OVER.

Billy K

On 18 Sep 09, at 12:11 AM, Stephen Guimond wrote:

> Ferreters,
>
> I am seeing some unwanted, odd thin white lines on my postscript  
> plot (attached pdf).  I remember someone having similar issues  
> before, but couldn't find it in the archives.
>
> Some key lines of my ferret script (note that using shade removes  
> the problem, but I want to use fill)...
>
> set mode metafile:fig19.plt
> fill/nolabs/hlimits=4:11:0.25/vlimits=50:600:50/pal=rnb2/levels= 
> (20,100,10)/set mean
> ppl ylab "Radius (km)"
> ppl xfor (i2)
> ppl axlint,4
> ppl fill
> label/nouser 4,-0.55,0,0,0.15 "Day (July 2005)"
>
> let er2 = ((14*60 + 40)/(24*60)) + 9
> plot/vs/overlay/nolab/line/thick=3/color=black {`er2`,`er2`},{50,600}
>
>
> My shell script to convert...
>
> #! /bin/tcsh
> ferret -unmapped -script plot_inertial.jnl
> set file = `echo *.plt | cut -d"." -f1 `
> gksm2ps -p portrait -o $file.ps $file.plt
>
> # script to increase line weights of Ferret output
> sed 's_3.000000 lw_6.000000 lw_g' < $file.ps >! foo; \mv foo $file.ps
> sed 's_2.000000 lw_4.000000 lw_g' < $file.ps >! foo; \mv foo $file.ps
> sed 's_1.000000 lw_2.000000 lw_g' < $file.ps >! foo; \mv foo $file.ps
>
> convert $file.ps $file.pdf
> rm -f *.ps *.plt
>
> Note also, that sometimes fill works (for other plots).  I am using  
> FERRET v6.1 for Linux.
>
> Thanks for ideas,
> Steve
>
> =======================================================
> Stephen R. Guimond
> Graduate Research Assistant
> Florida State University
> Center for Ocean-Atmospheric Prediction Studies (COAPS)
> =======================================================
>
> <figtest.pdf>