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Clint, I put together a tar file for a program called sfcntr which will contour 1 of the SFPARM parameters in sfmap. This program behaves like oagrid in calculating a mean station spacing for determining kx;ky (not user specified), and then will grid the parameter defined by CNTRPRM (which must be one of hte parameters listed in SFPARM). If you do not want to plot the sfparm values, then set COLOR for that plotting parameter to 0. Other parameters are similar to oabsfc and gdcntr (npass, gamma, weight, cint, line). If you have a chance, see if this solves your quest for such a program. Building instructions: download ~gbuddy/nawips-5.4/contrib/sfcntr.tar.Z into $NAWIPS Unpack the tarfile with "zcat sfcntr.tar.Z | tar xvf - Then build and install with: cd $GEMPAKHOME/source/programs/sf/sfcntr make clean make all make install make clean Usage example: AREA Data area dset GAREA Graphics area uslcc SATFIL Satellite image filename(s) RADFIL Radar image filename(s) SFPARM Surface parameter list tmpf DATTIM Date/time 1200 SFFILE Surface data file $SAO/20000628_sao.gem COLORS Color list 3 MAP Map color/dash/width 6 LATLON Line color/dash/width/label/inc 0 MARKER Marker color/type/size/width/hw 0 TITLE Title color/line/title 1/-1 CLEAR Clear screen flag y PANEL Panel loc/color/dash/width/regn 0 DEVICE Device|name|x size;y size|color xw PROJ Map projection/angles/margins|dr lcc FILTER Filter data factor 0 TEXT Text size/font/width/hw flag .5/21/1/hw SKPMIS Skip missing data flag NO LUTFIL Enhancement lookup table filenam default STNPLT Txc|mkc/mkt/mks/mkwd/hwfl|stnfil CNTRPRM Parameter to contour tmpf GAMMA Barnes Weighting parameter .3 WEIGHT Barnes Search Radius 50 LINE Line color/type/width 5/1/1 CONTUR subbox/smooth 3/3 NPASS Number of barnes passes 2 CINT contour interval 5 Chiz Steve Chiswell Unidata User Support