I made a merge of several AsterGdem blocks near Egypt and Israel. I have portions of the Dead and Mediterranean Seas. Since near Galilea elevations are below sea level this makes the following problem
When I define the null value as 0, the resulting image shows the seas as null values, which is correct, nevertheless, I also have some pixels inland forming a kind of a contour with the null value as 0.
What I want to accomplish is to have the seas as null values and inland elevation information correct also
Thanks before hand