“…The main weakness of this criterion is that the typology is altered through time or among different towns. Even for a specific town, the formation of such a typology is posterior to the delimitation of its centre; (d) the percentage of central uses area, or frontage per block (Murphy, Vance, 1954;Davies, 1959;Scott, 1959;De Blij, 1962;Bohnert, Mattingly, 1964;Carter, Rowley, 1966;Hartenstein, Staack, 1967;Curtis, 1993;Thurstain-Goodwin, Unwin, 2000). Even if the criterion of central use area is widely supposed as the most objective estimator of centrality, this is not without drawbacks, which will be presented later in detail, as this centrality estimator is widely applied in several methodologies.…”