The Shadow from Ekkaia.

“Outerra…is a ‘3D planetary engine’ that purports to be able to render a world in full detail, from space all the way down to pebbles on the surface. Meanwhile, Steve Edwards and Carl Lingard created the ME-DEM (Middle-earth Digital Elevation Model) Project in 2006, with the ultimate goal of rendering the entirety of Middle-earth in open-source data. Last year, they exported their data into the Outerra engine.”

Also in world-building news from Wired, Middle Earth as seen from space. As another Wired writer aptly noted on Twitter, Mordor looks like it was probably an impact crater.