Add to ORKGSciences complexes n'est pas très heureux comme nom. Il serait mieux d'appeler cette discipline, science du complexe ou encore mieux systèmes complexes.As dynamic geographic models integrate very large number of spatial interactions, large amount of computing is necessaryfor their simulation and calibration, in order to validate them. Here a new automated calibration procedure is experimented onthe European computational grid EGI using evolutionnary algorithms. The application to the Simpoplocal model enables toreduce the computing time (one week) for managing about 7 millions runs for a preliminary validating step of the processesand parameters introduced in the model