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John, The answer to your question about calculating X tics is the routine gdxplt.f in $GEMPAK/source/programs/gd/gdcross/ which calls the GPLT routine GDAXIS. Steve Chiswell >From: John Merrill <address@hidden> >Organization: UCAR/Unidata >Keywords: 200308071337.h77DbHLd007506 >Thanks, Steve: > >>So, apparently that is absolute location, and not relative to the panel. >>So you will want REFVEC=5;.55;.05 instead of REFVEC=5. >> >>Go figure! >> >> >Well, it had to be one way or the other, and I should have realized that >the use of "display" signaled a distinction >from the panel. After a little tweaking the Reference Vector is now >visible in a suitable spot. > >>. . . . >> >>The documentation of the WIND syntax in phelp shows "D" for directional arrow > s, >>which was added for GDPLOT2, but the gdcross code does not support >>this feature. I made some quick tests on the $GEMPAK.source/programs/gd/gdcro > ss/gdxpuw.f >>routine and can add that feature in 5.6.k. >> >> >An addition like ths could be helpful. I've become comfortable with the >A option, at least for now. I bumped the yxais limit up from >1000 hPa to 1010 hPa, resulting in the 1000 hPa wind vectors being >plotted above instead of on the x axis of the cross section. This >makes fewer of them cross busily into the thicket of ticks below the x >axis. Experience tells me that if I increased the limit to 1050, >say, the contours and filled areas would begin well above the axis; >presumably the boxes used in the contouring algorithm are just >large enough to cover area between 1010 hPa and 1000. I'm now pretty >happy with this figure format. > >Now, an additional question on coding. In what routine are the tick >locations determined, and drawn, for the x axis in gdcross? >I'd like to take advantage of the simple situation I'm plotting, and >could give this as a task to Ruth Platner. > >Again, much thanks. John > > >