Abstract: International audience; This article describes the different steps that have punctuated the collaboration between Transilien and OpenStreetMap France teams throughout the development of an open geographical database mapping the stations of the Île-de-France network. It shows that the partners in this project faced a series of challenges that gradually led them to reconsider the place of the data they wanted to make available, to find ways to equip the data labor, but also to reorganize themselves over time. From redefining the conditions for d...
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