In
meteorology, an
isogon is a line of equal or constant
wind direction on a
graph,
plot, or
map; an
isopleth of wind direction.
- Drawing Contour Plots (http://avc.comm.nsdlib.org/cgi-bin/wiki_print.pl?Drawing_Contour_Plots). A lesson plan that deals with drawing various isopleths including isogons.