text: I cannot be totally sure, having never been "sur les lieux" :) But the existence of the code LF3135, attributed by basulm.ffplum.fr, and the involgement of @romeodelta, a most serious and reliable contributor, makes it likely to me that there IS an aerodrome of some kind. Mind you, it is totally possible that it is no more than a part of the grass being mowed with more than usual care. Perhaps only used rarely, and only by parapente/ulm/... ? Adding a pointer to the reference.