Duke Nukem 3D .MAP 
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Title                   : SomePlace
Filename                : somplace.map
Author                  : Mike Regan
Email Address           : miker@crl.com
Misc. Author Info       : This is the first Duke level I made.
Description             : DeathMatch... oops, mean DukeMatch                    
Additional Credits to   : Apogge/3Drealms and My boss for leaving early
                          so I could make it at work.
                           
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* Play Information *

Episode and Level #     : E1L1
Single Player           : Nope, No Exit.
DukeMatch Level         : Yes
Difficulty Settings     : Nope.

* Construction *

Base                    : New level  
Editor(s) used          : Build
Known Bugs              : None that I know of.
* Where to get this MAP file *

Why do you want to know, Your already have it.
Is there an ftp site for duke levels, like there was for doom?