For block kriging yes, for point kriging the prediction (standard) error will be close to sigma.

And happy new year to everyone on ai-geostats!
--
Edzer

Isobel Clark wrote:
Mehari
If you use a semi-variogram which is just nugget, the kriging estimate will be the arithmetic mean of the sample values and the standard error will be the standard sigma/root n of classical statistics. Isobel

*/Mehari Tekeste <[EMAIL PROTECTED]>/* wrote:

    Can I get some suggestion on this issue?

    How good is estimation using kriging system that uses a nugget
    model? I
    have a geodata and the semi-variogram was best fit using a nugget
    model
    (with semi-variance=C_0; where C_o is a nugget for all h (lag
    distance)
    values.

    Thanks.

    Mehari Z. Tekeste, Ph.D.
    Research Scientist
    Department of Agriculture
    Western Kentucky University
    1906 College Heights Blvd. #41066
    Bowling Green, KY 42101-1066
    Phone: 270-745-5972
    Fax: 270 745 5972

    "And God said, Let us make man in our image, after our likeness: and
    let them have authority over the fish of the sea, and over the
    fowl of
    the air, and over the cattle, and over all the earth, and over every
    creeping thing that creepeth upon the earth." Genesis 1: 26.
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