Method for optimising the deployment of sensors (31, 32, 33) in a zone for the location of at least one target in said zone, each sensor being designed to detect, in binary fashion, the presence or absence of any target penetrating its detection surface (310, 320, 330), the method being employed in a system including data processing computer means, executing at least one optimising algorithm included in a memory space of the computer means, the method using an optimising algorithm with a plurality of objectives, is characterised in that it includes: a) recording, in the memory space of the computer means, of digital data relating to the surface geometry of the deployment zone, b) discretisation of the zone for deployment of sensors (31, 32, 33) into a plurality of potential discrete positions, by an algorithm executed by processing computer means, the algorithm using at least one spacing parameter (d 1, d 2) between the discrete positions in a memory space of the computer means, c) calculation, by the algorithm executed by the processing computer means, to determine the number of sensors (31, 32, 33) to be deployed and the positioning of each sensor to be deployed at a discrete position of the deployment zone, said optimising algorithm determining the number and positioning of the sensors to be deployed, by performing successive iterations of the optimising algorithm using: • at least one constraint requiring cover of all discrete positions of the deployment zone by the detection surface or surfaces of the sensor or sensors to be deployed, • optimising objectives requiring minimisation of: - firstly, the value representing the number of sensors to be deployed in the deployment zone, and - secondly, the number of discrete positions that can possibly be attributed to each target designed to be detected by at least one sensor. a) recording, in the memory space of the computer means, of digital data relating to the surface geometry of the deployment zone, b) discretisation of the zone for deployment of sensors (31, 32, 33) into a plurality of potential discrete positions, by an algorithm executed by processing computer means, the algorithm using at least one spacing parameter (d 1, d 2) between the discrete positions in a memory space of the computer means, c) calculation, by the algorithm executed by the processing computer means, to determine the number of sensors (31, 32, 33) to be deployed and the positioning of each sensor to be deployed at a discrete position of the deployment zone, • at least one constraint requiring cover of all discrete positions of the deployment zone by the detection surface or surfaces of the sensor or sensors to be deployed, • optimising objectives requiring minimisation of: - firstly, the value representing the number of sensors to be deployed in the deployment zone, and - secondly, the number of discrete positions that can possibly be attributed to each target designed to be detected by at least one sensor. - firstly, the value representing the number of sensors to be deployed in the deployment zone, and - secondly, the number of discrete positions that can possibly be attributed to each target designed to be detected by at least one sensor.