The OCS BD has become a real geographical reference for the PNRBV, as well as aerial photos or IGN maps. The retro OCS comic offers the possibility to go back in time. The cartographic and statistical valuations that these two databases allow are multiple: — assistance in drafting reference documents (charter, DOCOB, management plan...); — enriching the notes of issues (TVB, connectivity of prairial ecosystems, nature in the city, ZAN approach...); — monitoring the evolution of the territory and enriching the evaluation/revision of the charter through context and outcome indicators (urban sprawl, landscape closure, etc.); — communication media (paper and digital mapping). It would be possible, for example, to build a travelling exhibition around these topics to spark debate and collectively project ourselves into the future. These data will also be made available to Park partners and design offices who request it.