Hi list, what does this warning mean? "Warning in points2grid(points,tolerance): grid has empty columns/rows in dimension 1" It gets out when doing an overlay between points and grid [overlay(grid, pointsdataframe)], with sp package. 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... Giovanni
grid has empty column/rows warning
3 messages · G. Allegri, 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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Thanks Edzer. It's a sparse grid, indeed. I created it as SpatialPixels. I won't care... :-) 2008/4/7, Edzer Pebesma <edzer.pebesma at uni-muenster.de>:
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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