Hi Francois,Francois thanks for the info.
That's because I had it on my hydrography layer... I could cut it from the country thought.
Is this hydrology layer also available for downloadP
I didn't have to create my own dataset for hydrography, so I used Data & Maps' data and I don't have the right to distribute it. VMap should be a good place to start though.
thank you very much for your informations (and the boundary-file of course)