A code modulated signal transmitted by satellites (SV1-SV4) and formed by an individual code for each satellite (SV1-SV4) is received. At least one reference point (B) is selected, whose position is substantially known. Information is transmitted to the positioning means (S, MS) about the position of the at least one reference point, and about Ephemeris data on the satellites (SV1-SV4). Thus, at least the Ephemeris data on each of the satellites (SV1-SV4) to be used in the positioning and the location of the at least one reference point are used in the positioning of the receiver.