A nice example for swemap
 
  1. make sure you have in your path

    2.    /usr/local/GMT/bin
       /home/hgs/bin
       /home/hgs/gps/maps
  1. make sure you have in your current directory a suitable file

    2.    .gmtdefaults
    If not,
       cp /home/hgs/gps/maps/.gmtdefaults .
     
We plot three sets of sites, VLBI stations, VLBA stations and European-only VLBI stations, the latter ones in a cut-in map.  File vlbi-labels.dat looks like this:
   18.9394   69.6630  9 30.0 0 1 Tromso
   11.9264   57.3958  9 0.0 0 5 ONSALA
   11.6469   44.5205  9 0.0 0 1 Medicina
   14.9890   36.8760  9 0.0 0 9 Noto
   16.7040   40.6495  9 0.0 0 9 Matera
   -4.2514   40.4272  9 0.0 0 1 Madrid
   12.8774   49.1450  9 0.0 0 1 Wettzell
    6.8836   50.5248  9 0.0 0 11 Effelsb\040\040\040
  140.6627   35.9541  9 0.0 0 1 Kashima
 -147.4975   64.9784  9 0.0 0 1 Fairb
 -159.6651   22.1266  9 0.0 0 1 Kokee
 -118.2938   37.2326  9 0.0 0 3 OV\040\040
  -71.4882   42.6233  9 0.0 0 1 Westf
 -104.0151   30.6805  9 0.0 0 1 FtDavis
 -106.2456   35.7751  9 0.0 0 1 \040L-Alamos
  -80.3847   25.6138  9 0.0 0 1 Richmond
 -116.8055   35.2999  9 0.0 0 1 Gold
   27.7000  -25.8833  9 0.0 0 11 Hart\040\040\040
   11.8651   78.9296  9 0.0 0 11 Ny \375lesund\040\040
 and the other ones equivalently.  In tcsh, source the following file vlbimap.env
setenv PRJCT_world m1:200000000
setenv PRJCT_europe m1:100000000
setenv REGION_world -180/180/-80/80
setenv REGION_europe -15/35/30/65
setenv SX_europe -X5
setenv SY_europe -Y4.5
setenv RESOL l
setenv SWEMAP_ORIENT -L
setenv LEGBOX
setenv TIXX a90g30
setenv TIXY a30g30
setenv PUTLABELS no
setenv SYMBOL_vlbi t0.2
setenv SYMBOL_vlba c0.15
setenv SYMBOL_eurovlbi t0.2
setenv COLOR_vlbi 255/0/255
setenv VCOLOR_vlbi 4/0/0/200
setenv TITLE_vlbi "Mk-III VLBI"
setenv TITLE_vlba "VLBA"
setenv COLOR_eurovlbi 255/0/255
setenv VCOLOR_eurovlbi 4/0/0/200
setenv COLOR_vlba 0/200/200
setenv VCOLOR_vlba 4/0/0/200

swemap -O -s world vlbi vlba -o tmpb.ps

pslegend `maplgnd` -JX2.0/0.7 -K -O + -L -G255 -W1/0/0/0 >> tmpb.ps

swemap -K -s europe +L eurovlbi -o tmpc.ps

cat tmpb.ps tmpc.ps >! vlbimap.ps
# rm -f tmpb.ps tmpc.ps
# /opt/ghostview/bin/X11/ghostview vlbimap.ps

 $ source vlbimap.env

and you get the following result (jpg in this demo): ftp://gere.oso.chalmers.se/pub/hgs/hgs.man/vlbimap.*
 

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