Thanks landorl. I tried to blur the water edges but the result does not show much. How would you do it (I'm quite new to PS).
This is the updated version, with a close-up (2x) of the city proper (for some reason, I like the older part, downhill, better than the last I drew). All those bumps in the north should be barrows (burials), but I am not really satisfied of how they look.
Let me know.

Click image for larger version. 

Name:	Maëren.jpg 
Views:	93 
Size:	775.0 KB 
ID:	38028
Click image for larger version. 

Name:	CloseUp.jpg 
Views:	127 
Size:	1.27 MB 
ID:	38029