Abstract: A measurement-based prediction method for radiation path loss over a predetermined area comprises the steps of: determining a received signal strength (2) at least one first station resulting from a transmission of known properties (4, 6) from at least one second station, the first and second stations having known locations; determining radiation path loss data on the basis of the received signal strengths (2) and topographical information (6) of the predetermined area; analyzing the determined radiation path loss data to determine coefficients for a radiation propagation model; applying the radiation propagation model (10) to generate first predicted radiation path loss data at each of the locations of the first stations and over the predetermined area; determining shadowing values on the basis of differences between the received signal strength (2) and the first predicted radiation path loss data at each of the locations of the first stations; analysing the shadowing values to yield shadowing parameters rep