What is the default re-sampling method; majority, nearest, bi-linear, cubic, when you select the processing cell size and it is larger than your input raster cell size?
Resampling in analysis is done when necessary. In the default case, the nearest neighbor assignment resampling technique is used. This is because it is applicable to both discrete and continuous value types, while the other resampling types�??bilinear interpolation and cubic convolution�??are only applicable to continuous data. If necessary, bilinear and cubic techniques can be applied using the Resample tool as a pre-processing step before combining rasters of different resolutions. Please see the web-help documentation on Cell size and resampling in analysis for more: http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//00590000001m000000.htm
