The -R option

$B -U$B%*%W%7%g%s(B $B>e(B: GMT$B$N0lHLE*%3%^%s%I!D(B $BA0(B: -P$B%*%W%7%g%s(B

-R$B%*%W%7%g%s(B

-Rxmin/xmax/ymin/ymax[r] $B$GIA2hNN0h$r;XDj$7$^$9!#==?JK!$*$h$S;X?tI=5-$KBP1~$7$F$$$^$9!#EY!"J,(B[$B$*$h$SIC(B]$B$r;H$&$K$O!"(Bdd:mm[:ss]$B$H$$$&=q<0$r;H$$$^$9!#D>8rNN0h$N:G>.(B/$B:GBgNN0h$N$+$o$j$K:82<$*$h(B$B$S1&>e$r;XDj$9$k>l9g$O(Br$B$r$D$1$^$9(B($B?^(B1.12)$B!#(B

$B?^(B1.12: $B%W%m%C%HNN0h$r(B2$B
$\begin{figure} \centering \epsfig{figure=eps/GMT_-R.eps}\end{figure}$

$B%]!<%k(B $B%Y%C%;%k(B
1999-06-09

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**-R$B%*%W%7%g%s(B**