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ENVI-MAG Manual C3-23
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3. Tolerance
This is a percentage of the range of the input data.
The grid mesh is fit to the data points by an iterative minimum
curvature surface fitting technique. The process stops when the
surface changes by less than the specified tolerance value for all
the points in the mesh, or when the maximum number of iterations
have been reached.
The default tolerance is 0.1% of the input data range.
Hint: To improve a surface fit you must either reduce the tolerance
value or increase the maximum number of iterations, or both.
4. Maximum iterations
This specifies the maximum number of times the grid mesh will be
adjusted to get the grid within the tolerance range specified for the
input data.
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