Spatial Autocorrelation - using co-ordinates as smooth factors in GAM's plus Spatial correlograms + Moran's I

Dear List,

I apologise if this is not the correct place to ask this, however as
ecologists' s i guess a high proportion of you would of had to deal
with spatial autocorrelation.

First,

I have seen a method that used a GAM and included the coordinates of
the grid cells ( sample locations, in my case this will be long&lat)
as a smooth factor to account for spatial autocorrelation.

I was wondering if anybody here had done this as i can not find a
example, and am unsure how to structure the GAM.

Dear List,

I apologise if this is not the correct place to ask this, however as ecologists' s i guess a high proportion of you would of had to deal with spatial autocorrelation.

First,

I have seen a method that used a GAM and included the coordinates of the grid cells ( sample locations, in my case this will be long&lat) as a smooth factor to account for spatial autocorrelation.

I was wondering if anybody here had done this as i can not find a example, and am unsure how to structure the GAM.

Second,

Another spatial question - 

Spatial correlograms were constructed using Moran?s I coefficients at 10 distance classes. 

Once again, has anyone done anything like this?

Thanks,

Chris