1. Method ( 100 ; 200 ) for rendering a simulated Synthetic Aperture Radar (SAR) image, said method comprising the steps of: providing ( 110 ) a digital model comprising 3D coordinate data in a geo-referenced coordinate system; determining ( 120 ) a sub-section of the digital model; and rendering ( 130 ) the simulated SAR image based on the subsection of the digital model, wherein substantially each point in the simulated SAR image being associated to a three-dimensional (3D) coordinate in the geo-referenced coordinate system.