#!/bin/csh -f
south america
 gmt psvelo  /home/argus/geodesy/nglz/solv/mass.hori/vel1/soam.argentina_sa.psvelo -:  -J  -R   -Sr.8/.81      -A.035/.25/.07  -L  -Wvioletred     -Gvioletred        -K -O -V     >> pscript
 gmt psvelo  /home/argus/geodesy/nglz/solv/mass.hori/vel1/soam.argentina_sa.psvelo -:  -J  -R   -Sr.8/+f8p     -A.035/.25/.07      -Wpaleviolered  -Gpale violetred   -K -O -V     >> pscript
exit

 S  vector length
 A  vector width/ arrowhead length/ arrowhead width