The Court examined the issue of the opening of public data of three operators of the Ministry of Ecological and Solidarity Transition: the National Institute of Geographic and Forestry Information (IGN), Weather forecast -France and the Centre for Risk Studies and Expertise, environment, mobility and development (CEREMA), public administrative establishments producing and holding large amounts of data. These operators are required by the law of 7 October 2016 to make their databases and data open, that is to say listed, accessible to the public and reusable free of charge, but recurring application difficulties and insufficient control of this opening limit the exploitation of their data. The State asked those operators to develop their own resources through the sale of their data while proceeding to the free and free dissemination of them. It is essential that the State clarify the rules on data opening and accompany the redefinition of the economic models of its operators to put an end to the paradoxical injunction that threatens the economic equilibrium of these establishments.