
> does
>  
> sPDF_grid <- overlay(as(sGDF_in, "SpatialPointsDataFrame"), sGDF_ref)
>  
> work? Until a couple of months ago, this coercion would be automatic.


No, it now returns an error as such:

"Error in function (classes, fdef, mtable)  :   
  unable to find an inherited method for function "overlay", for signature "SpatialPointsDataFrame", "SpatialGridDataFrame""

But then, is it reasonable to assume that there used to be some undocumented automatic coercion that was going on, and now it's removed?

In this case, would it be possible to reconstruct what the automatic coercion would have been? I've tried a few combinations based on the documentation, but can't seem to quite replicate what's been going on before…


Thanks,

Jooil

--  
Jooil Kim
Postdoc Fellow
Scripps Institution of Oceanography, UC San Diego
Mailing address:
9500 Gilman Drive # 0244
La Jolla, CA 92093-0244, USA
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On Thursday, April 12, 2012 at 3:00 AM, r-sig-geo-request@r-project.org wrote:

> Re: Overlaying SpatialGridDataFrames over
> SpatialGridDataFrames? (Edzer Pebesma)



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