Ok, I advanced a bit expanding my territory. The spikes seem to be hickups in the procedurals. Canīt spot them in the terrain file (pov tga), need to get that cleared out. Here is a 4000x4000px render, perhaps a bit over the top, I wanted to see how it looks. It took about 1 hour.
Click image for larger version. 

Name:	LittleMap2.jpg 
Views:	252 
Size:	1.39 MB 
ID:	48355

Edit: Removed the spikes in PS. Couldnīt stand them