[R-sig-Geo] grid has empty column/rows warning

[Edzer Pebesma]

G. Allegri wrote:
> Hi list,
> what does this warning mean?
>
> "Warning in points2grid(points,tolerance):
> grid has empty columns/rows in dimension 1"
>   
That, when forming a grid from points, complete rows/columns are emtpy. 
Dimension 1 is x.
> It gets out when doing an overlay between points and grid
> [overlay(grid, pointsdataframe)], with sp package.
>   
Probably because it converts a SpatialPixels object (points on a grid) 
to the full grid representation.
> I receive a complete list of values for the points, uploaded from the
> grid, but I don't know if I have to care about the warning...
>   
Probably not.
--
Edzer
> Giovanni
>
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