Dear Geo-UseRs,

I am trying to fit a linear model in lme considering the spatial
autocorrelation structure of my data.
I know that the correlation has a half-normal shape, so I use the function
corGaus.

Observations are coming from several surveys, done at various dates
(sometimes several surveys occurred at one date), done during several years.

- I want to consider the spatial correlation that occur between observations
done in EACH survey

- I DO NOT want to consider spatial correlation between observations done
during ALL surveys

I define the spatial correlation structure as:   corGaus(form = ~ X + Y |
Year/Date/Survey)

Is it correct ?


Thanks for your help !

Arnaud

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