Method for determining the use of a geodesically allocable object by a mobile unit, the geodesically allocable object comprising at least one identification area (10, 14) and at least one area (11,12), the at least one area being positioned at the at least one identification area and being in the form of a polygon connecting the vertices of the at least one area, the mobile unit being adapted to exchange and process data and to store a data collection about the at least one identification area and recording the boundaries of the at least one identification area, the mobile unit further being adapted to store a temporary list S1 for recording an identified identification area and a list S2 for recording a visited area (11, 12) of the identified identification area, the method comprising the consecutive steps of a) obtaining the coordinates of the mobile unit at a point T1, b) verifying whether point T1 is located either inside or on the boundary of the identification area, using the boundaries of the identification area recorded in the data collection stored in the mobile unit, c) in case point T1 is outside the identification area, erasing the content of lists S1 and S2 and returning to step a), d) in case point T1 is inside or on the boundary of the identification area, verifying whether the identification area is already entered in list S1, e) in case the identification area is in list S1, jumping to step g), f) in case the identification area is not in list S1, first erasing the content of lists S1 and S2 and then entering the identification area as an identified identification area in list S1, g) verifying whether the current area (11,12) of the mobile unit is already entered in list S2, h) in case the area (11,12) is in list S2, returning to step a), i) in case the area (11,12) is not in list S2, entering the area as a visited area in list S2, j) determining whether all areas (11,12) of the identification area have been visited, k) in case that not all areas (11,12) of the identification area have been visited, returning to step a), l) in case all areas (11,12) of the identification area have been visited, activating tolling for the identification area and returning to step a). a) obtaining the coordinates of the mobile unit at a point T1, b) verifying whether point T1 is located either inside or on the boundary of the identification area, using the boundaries of the identification area recorded in the data collection stored in the mobile unit, c) in case point T1 is outside the identification area, erasing the content of lists S1 and S2 and returning to step a), d) in case point T1 is inside or on the boundary of the identification area, verifying whether the identification area is already entered in list S1, e) in case the identification area is in list S1, jumping to step g), f) in case the identification area is not in list S1, first erasing the content of lists S1 and S2 and then entering the identification area as an identified identification area in list S1, g) verifying whether the current area (11,12) of the mobile unit is already entered in list S2, h) in case the area (11,12) is in list S2, returning to step a), i) in case the area (11,12) is not in list S2, entering the area as a visited area in list S2, j) determining whether all areas (11,12) of the identification area have been visited, k) in case that not all areas (11,12) of the identification area have been visited, returning to step a), l) in case all areas (11,12) of the identification area have been visited, activating tolling for the identification area and returning to step a).