1

I just found out that the cell size of raster change after I rotate or georeference it with Georeference. Is there any explanation why it works that way?

2

If you have a regular grid of points aligned with your X and Y axis, and you rotate it, then the distance between your points parallel to the X (or Y) axis will change. This is the same with pixels, because they are resampled as rectangles with their sides parallel to the axis.

As for the georeferencing, it can include a change in scale, so obviously the pixel size might change. This change in scale depends on the projection (some projection will locally preserve the distances, but most don't)

  • Your answer explains it well, thank you very much :) – P. Anisa Feb 12 '15 at 7:16

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