The land available for housing corresponds to all the vacant land within the residential areas and to 75% of vacant land within the mixed-used areas in the municipalities' general land use plans (PAG) (in hectares). This is a theoretical potential, independently of the will of the owners to develop the land. The data sources are the digitalized cadastral parcels and the orthophoto-images from the "Administration du Cadastre et de la Topographie", as well as the PAG and PAP of the municipalities digitalized in collaboration with the Ministry of Interior.