I have a high resolution RapidEye image that was delivered in UTM 10, WGS84. When I reproject this image, the resulting output has a systematic stairstep pattern in it that seems too uniform. Every 31 to 32 pixels in both the north/south and east/west direction, there is a shift of 1-2 pixels. It really stands out in the roads and other linear features found throughout the image. I am getting the same result when I reproject any UTM image to another projection and/or datum, although the length of the stairsteps varies depending on the output projection. But if my input imagery is in a different projection, say Geographic, I am not seeing this systematic shift in the output; the linear features have a more normal, irregular nearest-neighbor blockiness.
I've attached a .jpg of an output image. Again, the absolute uniformity of the stairsteps throughout the output image is what raises questions with me.
Is this just a function of reprojecting from UTM and is "normal"? Or is there a problem with the transformation?
I would really appreciate any insight that could be provided.