On the Definition of Conurbation Boundaries

A procedure is proposed for the delimitation of conurbations, a term preferred to urban agglomerations. In the first stage the urbanized zone is demarcated, consisting of the central city and adjoining continuously built-up area. The method of the U. S. Bureau of the Census is recommended with some qualifications. In the second stage, minor civil divisions surrounding the urbanized zone are selected for inclusion in the conurbation, based on a combination of criteria involving nonfarm employment, population density, and evidence of “strong gravitation” to the urbanized zone. Regular travel to work, for shopping, and for recreation is suggested as an indicator of gravitation.