Ridges and troughs

Hi,

I am working on a plot where I need to draw a 'ridge' line (MSLP
chart). In the book "Weather Analysis" page 32 (Djuric), 'ridges' are
drawn as kinked lines and 'troughs' as wavy lines. Is there a way to
do that using gsn_add_polyline?

Another question: I need to make a line illustrating the flow of air
in an MSLP chart. This is not a straight line. If I use
gsn_add_polyline, the curve I am trying to draw looks more like a
'step function' than a smooth curve. When I try to use a bicubic
spline, I get an error saying that I don't have enough input data:
"SPLCC or SPLCW - SUPRLS failure". And if I use 'ftcurvs', I get error
4, which means that my lines are not increasing. This is because my
latitude and longitude vary (increasing/decreasing). Is there a way to
draw such curves in NCL?

I thank you so much in advance!

Kindest regards,

Michel
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Received on Mon Apr 13 2009 - 09:14:09 MDT