The Collaborative International Dictionary of English v.0.48:

Cadastral \Ca*das"tral\, a. [F.]
   Of or pertaining to landed property.
   [1913 Webster]

   Cadastral survey, or Cadastral map, a survey, map, or
      plan on a large scale (Usually 1/2500 of the linear
      measure of the ground, or twenty-five inches to the mile
      or about an inch to the acre) so as to represent the
      relative positions and dimensions of objects and estates
      exactly; -- distinguished from a topographical map, which
      exaggerates the dimensions of houses and the breadth of
      roads and streams, for the sake of distinctness. --Brande
      & C.
      [1913 Webster] Cadastre

WordNet (r) 3.0 (2006):

cadastral
    adj 1: of or relating to the records of a cadastre