Extract by Mask Rasters don't line up with originals

Discussion created by kpzimmer on Oct 21, 2010
Latest reply on Nov 29, 2012 by jeremiahlee
Hello all,

I am working with some Landsat imagery that I need to extract certain areas of the raster. I've tried extracting by a polygon mask. The extraction works fine but for some reason the output raster pixels no longer line up directly with the pixels from the original raster. Similary, if I use reclassify to export specific pixel values, these output rasters don't line up either. The shift is quite small, about half a pixel, but I can't figure out why it is doing this. Any ideas? Both the polygon mask and Landsat raster have the same projection so I don't see it being a projection issue.

Any help would be greatly appreciated!