I'm comparing the slope products derived from DEMs of various spatial resolutions (1m, 10m, 30m) for a set area.
The trend I find is that as the resolution improves, the areal extent of various extreme slope breaks (>45%, >50%, >70%) all increase. The areas increase by so much in fact, that it makes me question the reliability of anything I would produce from the 30m DEM - beyond using as just a general reference or guide. I'm inclined to believe that better resolution equates to a better answer, but know that isn't always the case.
Is there a simple enough explanation for this pattern I see?
Or perhaps 1m is overkill for this? Could noise be a big factor?