Abstract: A method of positioning a vehicle (N) that is provided with an electronic processor unit (2) connected both to a nonoptical positioning device (3, 4) and to an optical device (5) for taking external images, the electronic processor unit (2) including a database of landmarks including at least the geographical position of each landmark and a descriptive element describing each landmark, the method comprising the steps of: estimating a first geographical position (P1e) for the vehicle (N) by means of the nonoptical positioning device (3, 4); from the database, preselecting landmarks having geographical positions situated within a predetermined radius around the first geographical position (P1e) of the vehicle (N); selecting the triplets that minimize geometrical errors; controlling the optical device (5) for taking external images to take images of the selected landmarks; selecting images in which the landmarks are indeed visible, identifying the landmarks in the images, and, from the images, measuring a rel