  Two dimensional optical materials, such as graphene can be characterized by a
surface conductivity. So far, the transformation optics schemes have focused on
three dimensional properties such as permittivity $\epsilon$ and permeability
$\mu$. In this paper, we use a scheme for transforming surface currents to
highlight that the surface conductivity transforms in a way different from
$\epsilon$ and $\mu$. We use this surface conductivity transformation to
demonstrate an example problem of reducing scattering of plasmon mode from
sharp protrusions in graphene.
