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Minimum curvature surface problem [message #32597]

Mon, 21 October 2002 16:30

Med Bennett
Messages: 109
Registered: April 1997

Senior Member

I'm having a problem using the min_curve_surf function. I am feeding it
data where X and Y are in UTM coordinates (like 650000, 4073500) and Z
ranges from 0.25 to 27,300. The result from min_curve_surf in IDL is a
paraboloid looking surface with a minimum of 2.4E+10 and a max of
1.2E+15. Needless to say, this is dramatically wrong. I also tried
subtracting off the minimums from the X and Y values to reduce the
number of sig figs, but this does not seem to help. I can compute a
minimum curvature surface with the same data in another software package
(Surfer, Golden Software) and it gives me a reaasonable result. What's
wrong with the IDL implementation, or what am I doing wrong?

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