The Collaborative International Dictionary of English v.0.48:

Emplacement \Em*place"ment\, n. [Cf. F. emplacement.]
   A putting in, or assigning to, a definite place;
   localization; as, the emplacement of a structure.
   [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

emplacement
    n 1: military installation consisting of a prepared position for
         siting a weapon
    2: the act of putting something in a certain place [syn:
       placement, location, locating, position,
       positioning, emplacement]

Moby Thesaurus II by Grady Ward, 1.0:

70 Moby Thesaurus words for "emplacement":
   abode, allocation, area, assignment, balcony, bearings, bench mark,
   catafalque, collocation, dais, deployment, deposit, deposition,
   disposition, district, estrade, floor, gallery, heliport, hole,
   hustings, lading, landing, landing pad, landing stage,
   latitude and longitude, launching pad, lieu, loading, locale,
   locality, localization, locating, location, locus, packing,
   pinpoint, pinpointing, place, placement, placing, platform, podium,
   point, position, positioning, posting, pulpit, putting, region,
   reposition, rostrum, site, situation, situs, soapbox, spot,
   spotting, stage, stationing, stead, step terrace, storage, stowage,
   stump, terrace, tribunal, tribune, whereabout, whereabouts