Quality Check

After one DEM is projected onto the other, the difference between corresponding pixels from the two images was calculated in the overlapping area, excluding the spots with missing data.  With perfect DEM's and flawless registration, the difference should be zero for all the pixels.  In this case, however, the original DEM's from a radar system contain errors around minus to plus five meters.  In the figure below, the units are meters and pixel numbers, respectively.

Main Page || Original DEM Images || Extracted Features || DEM Mosaic I
DEM Mosaic II || Image Mosaic

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