The invention relates to a system (1) for managing a mass gathering on a geographical location, said system including an analytical platform (100) associated with a plurality of image acquisition devices (10) and network sensors (20) distributed over the gathering geographical location, the analytical platform (100) including: a data acquisition module (130), able to acquire participant distribution data generated from data from the plurality of image acquisition devices (10) and to acquire participant distribution data generated from data from the plurality of network sensors (20), and a data processing module (140) able, from the acquired distribution data, to calculate based on a supervised or unsupervised learning correction model, a corrected distribution data item of the participants in said gathering.