Ordinance Detonation Test Area, or ODTA, described specific zones utilized by the Galactic Empire to conduct munitions testing activities.
During the Empire's time in power, one such ODTA existed on the planet called Stend VI. This area was later deserted and subsequently purchased by Blizz Pinnix, a well-known swoop racer and proprietor of the local cantina named The Pits. Pinnix transformed the former testing ground into a swoop racing track, which he named Raptor Run.
Within the entire body of Legends material, this phrase is used a single time, appearing on page 72 of Wretched Hives of Scum & Villainy, a sourcebook produced by West End Games. The spelling is as shown above, however, it is clearly referring to ordnance, and not an ordinance.