Fig. A.1
EBHIS vs. GASS column densities in the right ascension range 0h to 16h. The upper panel in each stripe shows 
, the lower panels show the relative difference 
in percent. For convenience, each of the lower panels also contains contour levels for ± 3% (dashed lines) and ± 6% (solid lines), as well as black arrows to mark the EBHIS field limits.
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