% gpmap
 GEMPAK-GPMAP>l
 MAP      = 2
 GAREA    = usnps
 PROJ     = nps
 SATFIL   = 
 RADFIL   = 
 LATLON   = 0
 PANEL    = 0
 TITLE    = 2/-1
 TEXT     = 1.3/23//hw
 CLEAR    = yes
 DEVICE   = xw
 GEMPAK-GPMAP>r 

Now use the cursor command to select the CXSTNS axis

 GEMPAK-GPMAP>cursor cxstns

 GEMPAK-GPMAP>l cxstns
 CXSTNS   = 38.6;-106.4>41.5;-68.8
 GEMPAK-GPMAP>e

Use gdcross to plot the THTE cross section along the selected axis

 % gdcross
 GEMPAK-GDCROSS>l
 CXSTNS   = 38.6;-106.4>41.5;-68.8
 GDATTIM  = 910819/0000f018
 GVCORD   = PRES
 GFUNC    = thte
 GVECT    = WND
 GDFILE   = $GEMPAKHOME/data/hrcbob.grd
 WIND     = bk1/1/2
 REFVEC   = 
 PTYPE    = log
 YAXIS    = 1020/300
 CINT     = 4
 SCALE    = 999
 LINE     = 4/1/4
 BORDER   = 2/1/2
 TITLE    = 2/-1
 CLEAR    = yes
 DEVICE   = xw
 TEXT     = 1.3/23//hw
 PANEL    = 0
 CLRBAR   = 
 CONTUR   = 3/0
 FINT     = 4
 FLINE    = 30-7
 CTYPE    = c/f
 GEMPAK-GDCROSS>