From the readme

dod_flugplatz_source_b6 Author: |JWC|TOPGUNMav

This includes RCBot2 waypoints. (by INsane)

To install ************

The "dod" folder in the download should be copied into your "Day of Defeat Source" folder.

To find your dod folder…
1. Open your Steam Library
2. Right-click on the “Day of Defeat: Source” icon
3. Select “Manage” > “Browse local files” ….
4. A folder called “Day of Defeat Source” will pop-up, the dod folder is in there.
5. Copy and paste the “dod” folder in the download into “Day of Defeat Source” folder.

Authors note...

---------|JWC|TOPGUNMav---------
Map name: DOD_FLUGPLATZ_SOURCE
PORTED MAP: Yes, Original was Dod_flugplatz (from Dod 1.3)
Max Players: 32 players
Version: BETA 6 Release (Release date 02/09/2008)

About: An airbase in germany has been targeted by the allied forces. The airbase is being used by the germans as a key supply route. The allied soldiers must force the germans out of the airbase and capture it for themsleves. Meanwhile the germans are already short in numbers and the airbase has been heavily bombed.
Flags: 6 Flags, 2 flags being a 2 man cap in the hanger and the other on the taxiway.

About:

The conversion of Dod_Flugplatz is another of my DOD:Source conversion projects. Flugplatz was an original map made for dod 1.6 that I've converted and Sourcified. (BIG thanks goes to Fuzzdad for allowing me to do so!!)

Credits: Custom models by pedroleum (thanks for the cows), Ranson (BF109 models) and an unknown for an ordinance model

Fuzzdad - The Original designer of the old dod_flugplatz
Valve and Steam for making DOD:Source the game it is today