On the 28th of November 2017, Latitude (Andrea Bortolotti) has been invited to present within the framework of “The man with the Zeppelin’s eye. Duvigneaud, a pioneering personality and his legacy”, a cycle of conference organized by CIVA in collaboration with the Urban Ecology Center. In 1977, the ecologists Duvigneaud, Denaeyer-De Smet, and Tanghe published the “Ecological map of land cover and land use of the Brussels Agglomeration” for the Brussels Environmental Agency, and which provides still today a unique source of data about the biological functioning of open and green areas in Brussels. Almost forty years after, Latitude updates the work through the vectorialisation of available satellite images, the visual recognition and measurement of current ground cover to come up with a potential amount of biomass produced per urban area and actor of their management. The results, which aim to provide a basis for an integrated planning, has been part of the contribution to the study by LoUIsE, Université libre de Bruxelles, Faculty of Architecture La Cambre Horta, recently concluded with the workshop “Scenarios of Separate Organic Waste Collection”.