[SciPy-User] Obtaining contour data

[ashwin .D]

Hello,
         I have height data on a two  dimensional equidistant latitude
longitude grid and my ultimate goal is to calculate the curvature of the
contours. Here is an illustration of what I want to do -
http://www.indiana.edu/%7Egeog109/topics/10_Forces&Winds/sfc_trough.html.
The data is plotted on a two dimensional latitude longitude grid and then
the height contours are calculated. I am looking to obtain the coordinates
of the contours(shown in red) in terms of latitude and longitude so that I
can use that information  to calculate the curvature of the contour points
using a least squares method. Is it possible to do this in Scipy ? The
curvature of the earth is itself irrelevant in this case and it can be
assumed to be flat.

Regards,
Ashwin.
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