Re: AI-GEOSTATS: Re: Kriging using Nugget Model

2007-01-02 Thread Edzer J. Pebesma
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 sampl

AI-GEOSTATS: Re: Kriging using Nugget Model

2007-01-02 Thread Isobel Clark
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 suggestio

Re: AI-GEOSTATS: Kriging using Nugget Model

2007-01-02 Thread Gerald van den Boogaart
Dear Mehari Tekeste, Kriging with a pure nugget model is about the same as predicting everywhere with the mean of the observations, which is probably the best you can do if there is no spatial correlation and no further information. The kriging error i.e. the prediction variance will be (1+1/n)C_0