The project, carried out by the Department of Loire-Atlantique in partnership with Nantes Métropole, CARENE, Sydela, the Grand Port Maritime and CAP Atlantique, concerns the mutual acquisition of a digital orthophotograph. The project aims to carry out an ortho-rectified aerial photo shoot of the Loire-Atlantique department. The aim is to describe the geography of more than 7.000 km² with an unprecedented resolution on a departmental scale (10 cm), with no difference between the agglomerations, the peri-urban and rural areas, which will all benefit from this level of detail so far only reserved for dense urban centres.