Hi
I got the same error trying to do something similar. For me the
problem was with the polygon data. One of the shapes was corrupted. My
tip is to try and identify what polygon renders the error and confirm
that it is OK.
-David Wahlund
On Wed, Mar 18, 2009 at 16:01, Wesley Roberts wrote
On Thu, Jan 15, 2009 at 12:07, Edzer Pebesma
wrote:
>
>
> David Wahlund wrote:
>>
>> Hi,
>> trying to extract by mask using sp package.
>> Was surprised that I couldn't find 'overlay(x =
>> "SpatialPixelsDataFrame", y = "SpatialPolyg
eem
to be getting the index values of the pixels or something. The raster
is float, as seen from the summary below. But the return from
overlay() is ordered integer.
Am I missing something?
Thank you
David Wahlund
> summary(asc)
Object of class SpatialPixelsDataFrame
Coordinates:
min max
