GEMPAK-SFMAP>restore $GEMPAKHOME/defaults/sfmap.nts
 GEMPAK-SFMAP>sffile=$GEMPAKHOME/data/hrcbob.sfc
 GEMPAK-SFMAP>area=dset
 GEMPAK-SFMAP>garea=10;-125;50;-20
 GEMPAK-SFMAP>$MAPFIL=loconh.gsf
 GEMPAK-SFMAP>sfparm=skyc;tmpc;;;;;dwpc
 GEMPAK-SFMAP>proj=str/90;-100;0
 GEMPAK-SFMAP>dattim=20/00
 GEMPAK-SFMAP>d
 AREA      Data area                         dset
 GAREA     Graphics area                     10;-125;50;-20
 SFPARM    Surface parameter list            skyc;tmpc;;;;;dwpc
 DATTIM    Date/time                         /00
 SFFILE    Surface data file                 $GEMPAKHOME/data/hrcbob.sfc
 COLORS    Color list                        1;2;3;25;5;6;7;9
 MAP       Map color/dash/width              3/1/1
 LATLON    Line color/dash/width/label/inc   0
 MARKER    Marker color/type/size/width/hw   0
 TITLE     Title color/line/title            1/-2
 CLEAR     Clear screen flag                 YES
 PANEL     Panel location/color/dash/width   0
 DEVICE    Graphics device                   xw
 PROJ      Map projection/angles/margins     str/90;-100;0
 FILTER    Filter data factor                yes
 TEXT      Text size/font/width/hw flag      1.3/23//HW
 SKPMIS    Skip missing data flag            no
 GEMPAK-SFMAP>r
 SFMAP PARAMETERS:
 
 Data area:          dset                                            
 Graphics area name: 10;-125;50;-20                                  
 Valid parameters:    SKYC TMPC BLNK BLNK BLNK BLNK DWPC
 Parameter colors:     1    2    0    0    0    0    3 
 Time:              910820/0000    
 File:              $GEMPAKHOME/data/hrcbob.sfc                                 
 Map:               3/1/1                   
 Marker:            0                       
 Title:             1/-2                                            
 Device:            xw                      
 Projection:        str/90;-100;0                   
 Clear screen:      YES
 Filter:            YES
 Filter factor: 1.00
 Panel:             0                                               
Enter  to accept parameters or type EXIT:

Great, now if you think that that isn't much data you can adjust the filter to 0.7 and see the difference.

And one more thing, what would you have seen if you left PROJ set to NPS as it was in the defaults files sfmap.nts?

map

Not so great, eh? If you often like to look at North American plots, you may want to keep the PROJ and GAREA settings we just used in their own defaults file. (I do!) Here's a copy of my file namerica.nts: 

PROJ    str/+90;-100;0/0;3;0;2                                                  
GAREA   10;-125;50;-20
Pretty simple, huh? Whenever I want to draw a graph of North America, all I do is: 
GEMPAK-PROMPT> restore $GEMPAKHOME/defaults/namerica.nts

warning:Before you move on, be sure to set the $MAPFIL back to the default!!!

GEMPAK-SFMAP>$MAPFIL=MEPOWO.GSF
GEMPAK-SFMAP>exit


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