[ferret_users] color key gets wrong

[Sabine Brinkop <sabine.brinkop@xxxxxx>]

Hi ferret users,

I tried to plot  Lagrangian trajectories with the skript below.
However, the resulting color key of the first plot is erroneous. The
colors get mixed and
the underlying land area changes the color from grey to dark blue (see
attached figure).
Is there a way to fix the colors to the favored color key?

Regards,
Sabine


___________________________________________________________
cancel viewport
SET WINDOW/CLEAR
cancel mode logo
PPLUS/RESET
set memory/size=400

use sh_vol.nc
use sh_pos.nc

let mask1=if(ppress[d=2,l=30] lt 200) then 1
let mask2=if(slagvol[d=1,l=30] lt 0) then 1
let mask=mask1*mask2

DEFINE VIEWPORT/XLIM=0.,0.9/YLIM=0.0,0.5 V1
DEFINE VIEWPORT/XLIM=0.,0.9/YLIM=0.4,0.9  V2

set viewport v2
go basemap x=0:360 y=4S:90N
repeat/l=1:30 (go polymark
poly/over/key/line/fill/nolabel/pal=land_sea/levels=(-inf)(-1.E6,9.E5,1.E5)(inf)
plon[d=2]*mask plat[d=2
]*mask slagvol[d=1]*mask/1.E9 circle 0.5; ppl shaset reset)

set viewport v1
 go basemap x=0:360 y=4S:90N
 repeat/l=1:25 (go polymark
poly/over/key/line/fill/nolabel/pal=land_sea/levels=(100)(200)(500)(1000)(2000)(5000)(10000)(20000)(500
00)(100000) plon[d=2]*mask plat[d=2]*mask shx_vec[d=1]*mask/1000 circle
0.5; ppl shaset reset)

frame/file=test.gif
_______________________________________________________________________________

-- 
-------------------------------------------------------------------
  Dr. Sabine Brinkop      sabine.brinkop@xxxxxx
  DLR - Institut für Physik der Atmosphäre
  Oberpfaffenhofen
  D-82234 Wessling, Germany
  Tel.: +49-8153-282512  Fax: +49-8153-28-1841
  http://www.pa.op.dlr.de
-------------------------------------------------------------------