Thank you for your interest in investigating further.
I am working on a very large project of making great Britain, about each mile is worth a cell. So you can imagine how big this is going to be.
At this moment I am using google Earth to know what the areas look like, and the general idea of the heightmap. The world will nearly be completely handmade.
At the moment I do not intend to use any new or unique objects, the original objects and textures is all I am going to use.
This project is at it's very first stage of overlaying the satellite images of the counties with cell grid map, the sizes of these gridmaps will be compared to the size of Cyrodiil, Nottinghamshire grid map is nearly finished.
My attention is on planning on how Lincolnshire, and Nottinghamshire will be like- I hope these images of Nottinghamshire will help you to understand a bit better.
If this project goes well, other countries will be worked on.
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If you are interested ask me any questions, and I'll answer them for you. Better explanations will be mentioned.