geo·man·cy /ˈʤiəˌmæn(t)si/
  泥土占卜
  Ge·o·man·cy n.  A kind of divination by means of figures or lines, formed by little dots or points, originally on the earth, and latterly on paper.
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  geomancy
       n : divination by means of signs connected with the earth (as
           points taken at random or the arrangement of particles
           thrown down at random or from the configuration of a
           region and its relation to another)