  We construct Grassmann spaces associated with the incidence geometry of
regular and tangential subspaces of a symplectic copolar space, show that the
underlying metric projective space can be recovered in terms of the
corresponding adjacencies on so distinguished family of k-subspaces
(geometrical dimension of the space being not 2k+1), and thus we prove that
bijections which preserve the adjacency are determined by automorphisms of the
underlying space.
