Dear list
members,
Does anyone can help
me understanding variogram range interpretation or send me some specific
references.
I am currently
analyzing variograms computed over the same site of a remote sensing image. The
first variogram was derived from the original image and the second one was
derived from the transformed image (using a mathematical model). All the
variograms were fitted with an exponential model. The range value I got
from the transformed image is higher than the one from the original image. I
would like to know:
1. For ranges of 4
pixels (original image) and 9 pixels (transformed image), does this difference
can impact significantly on a ground sampling for instance
? What
should be the acceptable range difference ?
2. In terms of
spatial correlation, can we say that a high range value is associated with a
less spatial correlation between data points (pixels)? On other hands, the
spatial information content was reduced by the transformation
?
3. Can we say that
data with small variogram range is more heterogeneous than data with high
variogram range ?
Regards,
Charles
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