Chemistry Reference
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tion images (except the data concerning the summer campaign 2004 in the
Adriatic Sea), since this is the most targeted and cheap product for this ap-
plication. Recent studies (Gade and Redondo 1999, Gade et al. 2000) have
shown that a pixel size of 50 m (resolution of 100 m) is sufficient for sta-
tistical investigations of marine oil pollution.
Fig. 3.
Aerial surveillance in the Baltic and in the North Sea in the year 2000
For securing to the maximum possible degree that the detected spills
were due to man-made activities and not to
look-alike
manifestations of
natural phenomena, all the images were interpreted carefully through vi-
sual inspection. Each identified spill was registered in a database, together
with information concerning its geographic position, the date and time of
