Abstract
Anderson localisation in two dimensions is modelled numerically using the Langreth-Abrahams generalisation of the Landauer formalism. This approach allows an investigation of systems with disorders as small as W/V=0.1. The increasing effect of the finite system size as seen in the surface resistance is studied and taken into account. Results agree with the scaling theory of Abrahams et al. (1979) in the small disorder region.