a track line on the map

[Xiaofeng Gong]

Hi,

I am trying to plot a storm track in a base map. How to connect a few
points to a line (or a track)? it seems that using 'draw line' will be
appropriate.

Basically, in my data file, saying only three grid points have values, the
rest of the map are undefined. I need to connect these three points which
are actually the storm track i want to plot. Can someone share your tricks
and experience with me?

Thanks!
Xiaofeng