  We calculate the local density of states (LDOS) for an infinite graphene
sheet with a single centro-symmetric out-of-plane deformation, in order to
investigate measurable strain signatures on graphene. We focus on the regime of
small deformations and show that the strain-induced pseudo- magnetic field
induces an imbalance of the LDOS between the two triangular graphene
sublattices in the region of the deformation. Real space imaging reveals a
characteristic six-fold symmetry pattern where the sublattice symmetry is
broken within each fold, consistent with experimental and tight-binding
observations. The open geometry we study allows us to make use of the usual
continuum model of graphene and to obtain results independent of boundary
conditions. We provide an analytic perturbative expression for the contrast
between the LDOS of each sub-lattice, showing a scaling law as a function of
the amplitude and width of the deformation. We confirm our results by a
numerically exact iterative scattering matrix method.
