Editing Census tract (section)

=== France ===
In 1999 in France, in order to prepare for the dissemination of the 1999 French population census, INSEE ([[Institut national de la statistique et des études économiques]]) developed a system for dividing the country into units of equal size, known as IRIS2000, but now known simply as 'IRIS'.<ref name = iris>{{cite web |url=https://www.insee.fr/en/metadonnees/definition/c1523|title=IRIS. DEFINITIONS. Publication date: 13/10/2016|publisher=INSEE |access-date=2022-05-13}}</ref> The acronym stands for 'Ilots Regroupés pour l'Information Statistique' (‘aggregated units for statistical information')<ref>{{cite web |url=https://www.insee.fr/fr/metadonnees/definition/c1523|title=IRIS. DÉFINITIONS. Date de publication : 13/10/2016|publisher=INSEE |access-date=2022-05-13}}</ref> and the 2000 in the name referred not only to the upcoming [[millennium celebrations|millennium]] year but to the target size of 2,000 residents per basic unit. Since 1999, IRIS has represented the fundamental unit for dissemination of infra-municipal data in France and its [[overseas departments and regions of France|overseas departments and regions]]. Towns with more than 10,000 inhabitants, and a large proportion of towns with between 5,000 and 10,000 inhabitants, are divided into several IRIS units. France is composed of around 16,100 IRIS in total, of which 650 are in the overseas departments.<ref name = iris/> There are 3 types of IRIS unit in use: residential IRIS (pop. between 1,800 and 5,000), business IRIS (containing more than 1,000 employees) and miscellaneous IRIS (specific large zones which are sparsely inhabited and have large surface areas (leisure parks, ports, forests etc.).<ref name = iris/>