The document describes a partnership called GéoBretagne that aims to share territorial knowledge and data between organizations to help with public decision making. The partnership values pooling and sharing data openly by default, local control through a modular and interoperable platform, and requiring metadata from data producers. The data ecosystem diagram shows flows between public authorities, communities, and other groups using the partnership's data services platform. Charts show growing usage of the platform over time as new services and data are added.