The Wired Campus had an intersting article today – "U. of Maryland Imaging Center Recreates Early Washington." [Note: The article was actuially about UMBC not U. of M.] The article talks about how members of the Imaging Research Center at the University of Maryland Baltimore County are recreating Washington’s original landscape digitally. The article describes how "The efforts has precisely located both early buildings and long-lost but critical local features like Tiber Creek, vestiges of which survive today as a sewer under Constitution Avenue." Since the article was so short, I looked for more information and found the UMBC Imaging Center website.
It was quite fascinating to watch and I encourage you to check it out.There is also a nice article about this in the Washington Post.