The goal is to restructure private or partly private properties in a given area, with public intervention (Regulation, authorization, financing, and even targeted expropriations), in order to maximize their usefulness and construction of infrastucture financed entirely or partly by owners (through land transfers, whose sale revenue is used by public revenue to finance investments and lands dedicated to public use; and financial contribution). They can take place in peri-urban areas with little or no built-up sites (land readjustment) or in the under-used urban areas (land redevelopment). Those lands, (or built-up surfaces in case of redevelopment) are redistributed between owners based on their value after operation.This restructuring can be initiated by land owners, local governments, public or private developers, public or private transportation companies (metro-vehicles for instance), and even the local population. It is a consensus-based process, with a minimum approval threshold that varies across countries.