the present invention proposes to use optimally a location method based on a wifi type short - range telecommunication system and a satellite location system . the short - range telecommunication system is used to locate the terminal accurately within the building in which it is situated . the method uses a cartographic representation of the buildings in order to deduce from the position of the terminal a set of satellites that could be received by the terminal . the satellites are then acquired to synchronize the terminal to the satellite system . that synchronization is then used when the terminal leaves the building to acquire as quickly as possible the set of satellites of the satellite navigation constellation .