http://www.avclub.com/article/programmers-create-scale-model-of-middle-earth-inv-107359
"Middle Earth Digital Elevation Model Project (MeDEM for short) is working to close the gap. The MeDEM team has modeled the entirety of Tolkien's fantasy world using the Outerra engine, a tool used to create detailed digital landscapes with minimal amounts of data, which in this case consists of descriptions of Middle Earth's topography taken from The Hobbit and The Lord of the Rings books. When inside the model, users can zoom out and view Middle Earth from on high, walk around the barren plains of Mordor up close, or anything in between."
"Middle Earth Digital Elevation Model Project (MeDEM for short) is working to close the gap. The MeDEM team has modeled the entirety of Tolkien's fantasy world using the Outerra engine, a tool used to create detailed digital landscapes with minimal amounts of data, which in this case consists of descriptions of Middle Earth's topography taken from The Hobbit and The Lord of the Rings books. When inside the model, users can zoom out and view Middle Earth from on high, walk around the barren plains of Mordor up close, or anything in between."