DATA=(L1,S1,L2,S2, The DATA parameter specifies that
...,Ln,Sn) a series of pixel coordinates are
to be transferred directly to the
graphics file. Any number of
line and sample points may follow
the DATA parameters.
MDATA=(SL,SS,EL,ES,N) MDATA specifies that a line
segment filling option is to be
invoked. A line having N total
points is interpolated for the
line segment beginning at
starting line, starting sample
(SL,SS) and ending at ending
line, ending sample (EL,ES).
SL,SS and EL,ES are the endpoints
of the output line, and N-2
points are interpolated between.
The line segment terminating
value (0.,0.) is added at the end
of the line segment, consequently
n+1 pairs of values are output.
Several line strings may be
processed subsequently by
repetitions of the five data
values.