Main objectives of the workshop: To bring together French scientists active in a truly fertile field but often segmented by the very nature of the individual projects, and to trigger a community wide reflection on the key role of large surveys in today's science and how to ensure their success. * Communities: The first workshop was endorsed by the PNCG although the science enabled by such surveys goes beyond galaxies&cosmology, and, as expected, we reached an audience extending to other poles (PNP, PNPS). We did not in consequence request a formal endorsement for this second edition. * Description / Scientific context: Wide field astronomy has now moved into an all-sky regime. French scientists are particularly active in the arena of wide-field imaging, the international context of photometric surveys (deep and/or all-sky) being highly relevant for the many themes explored within the PNCG, PNPS, and PNP. The ESA Gaia mission is a brisk success while the two prominent upcoming international imaging projects, Euclid and Rubin-LSST, both cosmology driven (Stage IV dark energy measurement) will inherently produce datasets that will represent a treasure trove for scientific topics ranging from the Solar System to cosmology. This explains the large size of these scientific collaborations, with France very well positioned in the three projects listed above. There are other ambitious surveys currently in acquisition phase which focus on specific scientific aspects and, unsurprisingly, several French experts operate within these international collaborations (DES, DECaLS, HSC, etc.). Specifically a French co-led effort, critical complementary data for the Euclid space mission led to the development of tailored ground-based surveys such as the Canada-France Imaging Survey (CFHT), now within the international joint effort Ultraviolet Near-Infrared Optical Northern Survey (UNIONS) with Pan-STARRS, Subaru's WISHES, and soon CEFCA's JEDIS-g, to cover in the u,g,r,i,z bands the northern sky in the u,g,r,i,z bands at unprecedented depths. UNIONS which is open to anyone in the French community produces today stand-alone scientific results, particularly on galactic archeology and cosmology.