New answers tagged transparency
1
Problem:
Even if you could set a tolerance, you wouldn't get all of the sea, and you would still have text in the sea ('Mittelsee' etc).
Possible Solution
You might be better served by using a vector coastline map to select and copy only the areas of the georeferenced raster that you want to keep. Put it in a separate raster. Remove the original raster. This ...
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