1. A method for estimating in anticipatory manner the radio coverage of a cell ( 1 ) of a cellular, wireless telephone network, by means of a radio station ( 11 ) managing tile traffic of the cell ( 11 ), using a database ( 32, 33 ) of a relief map ( 31 ) specifying said cell's positions of salients ( 41, 42 ) and what they are, said method involving a computation system dulling an operational stage, fictitiously transmits into tile cell ( 1 ) a sampling beam that shall render the conditions of radioelectric propagation along an initial segment of a path ( 51 ) from an initial position and along one direction and in specific conditions of propagations by reading the database ( 32, 33 ) compares the path segment ( 51 ) with the data of the relief map ( 31 ) to identify tile position and the nature of a salient ( 41, 42 ) at any instantaneous incidence site of the path segment ( 51 ), determines, according the nature specified in the database of the salient ( 41, 42 ) under consideration, new propagation conditions on a downstream path segment ( 52 ) beyond said incidence site, iterates as called for the two above stages a given number of times for other downstream path segments ( 52 - 55 ), determines, according to tile propagation conditions along tile full path, a cumulative attenuation for any selected site of said path, and repeats all the above stages a plurality of times for a plurality of initial directions in order to sample the entire cell ( 1 ) and in this manner to ascertain a map of attenuations of the selected sites, said method being characterized in that in an initial phase, the computing system: devises tile database ( 32, 33 ) in the form of a direct-access matrix of local and independent specification of tile positions and kinds of resp. salients ( 41, 42 ) of a plurality of predetermined meshes of a corresponding mesh topology of the map ( 31 ), and stores tile geographic-orientation data of tile salients in the matrix database ( 32, 33 ), in the operational phase, the computing system: compares the position of the instantaneous site with the meshing topology to identify an incidence mesh, following incidence, computes the post-incidence propagation conditions on the basis of the local and independent salient specification data of the incidence mesh, and computes one direction of the reflected beam of a downstream segment ( 52 ) based on the orientation data.