L’offre du GIS Sol aux politiques d’aménagement urbain

Urban planning stakeholders are increasingly interested in information enabling them to qualify and manage the soils of theirterritory. The data made available to them by the GIS Sol programs are among the most relevant for questions relating to the consideration of functions and chemical quality of soils. In this last area, the database of urban soil analysis (BDSolU), supported by BRGM, which joined GIS Sol in 2021, should play a major role. Indeed, it aims to provide essential pedogeochemical backgrounds to follow ministerial recommendations for the diagnosis of potentially contaminated soils and the management of excavated soil. This program includes data acquisition, development of the calculation of pedogeochemical backgrounds and restitution to users. The study of the interoperability of BDSolU and DoneSol data, carried out by INRAE, has also begun to allow the simultaneous interrogation of the two databases.BDSolU has already contributed to the determination of the pedogeochemical backgrounds of soils in the lower Seine valley as part of the GeoBaPa project led by Soltracing, and in the territory of Toulouse Métropole during a methodological demonstration project led by BRGM. In return, the analysis results collected by these projects have also fed the database, which improves its statistical representativeness.Development actors now have to respond to new challenges and new objectives, in particular that of zero net artificialization(ZAN) set by the so-called “Climate and Resilience” law. This law introduced the consideration of the functions exercised bysoils in the Town Planning Code. The MUSE partnership project coordinated by Cerema has produced soil maps at 1:250,000 offunction indicators and multifunctionality index based on data from the GIS Soil. The mapping tools developed provide knowledgeon soils in order to guide urban planning documents. This project highlights the need for additional data, to increase the scale ofapplication but also to better understand the urban environment.In the future, the programs carried out by the members of the GIS Sol will have to ensure the stroage of large flows of data, whilerespecting prerequisites in terms of quality to allow the appropriation of this information by all the actors of the development of theterritory. Raising their awareness of the importance of soils and their preservation is an essential prerequisite. Los actores de la ordenación urbana tienen un interés creciente en la información que