15 Italian Population and housing censuses Geneve may

15° Italian Population and housing censuses Geneve, may 25 2012 Experience with address lists and other preliminary work: the house number archive, an information infrastructure for the country Francesco Di Pede - Damiano Abbatini ISTAT Dipartimento dei censimenti generali degli archivi amministrativi e dei registri statistici

15° Italian Population and Housing Censuses. Main strategic innovations: üMunicipality Population Register (LAC – Liste Anagrafiche Comunali) used to organize and control the field work (mail out of questionnaires and check list of respondents); üSupplementary lists of Auxiliary Sources (LIFA – Liste Integrative da Fonti Ausiliarie; RNC – Rilevazione dei numeri civici) used to control undercoverage of LACs; üShort Form for a sample of households; üMulti-Way Responses (Internet, postal carrier, hand-delivery). In this context of technical and organizational innovations, addresses and house numbers are instruments of great importance, as indispensable for the accurate localization of statistical units.

15° Italian Population and Housing Censuses A strategic goal of the Census has been the creation of the municipal archives of addresses (house numbers) geocoded to the census enumeration areas, used to: üGeocode the municipality population registers LAC; üGuide the enumerators in the field work; üRetrieve the undercoverage of registers and non-response of households; üUndertake census of buildings.

15° Italian Population and Housing Censuses In the new 2010 -2011 census strategy, Istat has developed and tested methods and technological tools for the construction of a database of street list integrated with house numbers geocoded to enumeration areas, by the use of different sources. This strategy provides differentiated arrangements for the acquisition and processing of data, depending on the different demographic classes of the municipalities. üGeo. Civ: Experimentation on municipal address indexes to build-up municipal street indexes and address indexes for RNC (urban areas of main cities); üRNC: House number survey (urban areas of main cities); üANSC: Street indexes and address indexes national archives (other areas of main cities and other municipalities).

Geo. Civ Project Geo. Civ - In the period 2009/2010 Istat has acquired street indexes and address indexes from all NUTS 3 level chief town and municipalities with population over 20, 000 inhabitants § Objective: construction of municipal house numbers statistical archives geocoded to the census enumeration areas; § § In collaboration with Poste Italiane (Italian Postal Service); § § Once prepared the data, the standardization of archive was started up; At the end of the standardization and normalization of the archives, addresses were geocoded to enumeration areas and georeferenced. First step: elimination of duplicate or blank records and identification of qualifying attributes in the heterogeneous information received;

RNC – House Number Survey. Carried out in the major population centers by enumerators during the period November 2010 - March 2011. § 509(1) municipalities involved: All NUTS 3 level chief town and municipalities with population over 20, 000 inhabitants on 1 January 2008 (53% of the resident population in Italy); § Objectives. RNC had three objectives: to produce, before the census, a database of house numbers validated by each municipality and geocoded to the enumeration areas census; allow construction of a list to facilitate the recovery of municipal population registers undcoverage; collecting information on building stock and characteristics, thus anticipating a substantial part of the field work traditionally carried out simultaneously in the census of population and housing; (1) The city of L'Aquila was excluded because of the earthquake of April 2009.

ANSC (2010 -2011) – Street indexes and adreess indexes National Archives in collaboration with Land Registry Office (Agenzia del Territorio – Ad. T). Information subject to constant updating by municipalities to which they can accesspublic administrations, citizens and enterprises § 7. 585 municipalities involved: municipalities with population under 20, 000 inhabitants on 1 January 2008 (47% of the resident population in Italy); § certification of the street index: approving, modifying and integrating a computerized street index proposed by the Ad. T; § compilation of the “new form Istat CP. 5" (set of circulation areas and house numbers that fall within each census enumeration area); § municipalities have been working off-line using software installed on their workstations for the compilation and updating of their street index

Framework of the activities 2006 Feasibility study 2009/2010 ANSC Project PORTALE PER I COMUNI 2007 Presence Municipal Archives survey 2007 Testing of pilot areas 2008 Geo. Civ project definition 2009/2010 Geo. Civ project implementation RNC 2010/2011 House number survey (RNC)

RNC: field work tools data source • Updated aerial photos of the territory • 2011 Enumeration Area’s boundaries • Graph maps of commercial source • ADT Cadastral mapping of buildings Municipal Archive of addresses INDIRIZZO SEZ 2011 VIA LICONI 3 A VIA EMILE LEXERT 1 98 98 • Geo. Civ house numbers archive

RNC: buildings-addresses relationship Municipal Archive of addresses ADDRESS SEZ 2011 VIA LICONI 3 A VIA MONTE ROSA 1 98 98 BUILDING CODE B C C A INTENDED USE residential not-residential Address found by enumarator VIA LICONI 5 98 C residential Rosa onte Via M

RNC: buildings enumeration Identification of missing buildings in cadastral mapping 4 3 2 1 • Buildings 1 to 2 - 3 - 4 have been reported in the database by address

Via del Bracco F Via della Cons uma G I J N H Via Cad ibon a House numbers from municipal House number from survey archive RNC: enumeration area 1 D M A E B K O Via del Bracco 2 L

Summary data for enumeration area Enumeration Area n. 357 List/input Variation House number 22 +15 37 Buildings 14 +2 16 Households 53 -4 49 111 -3 108 Via del Bracco People Via della Cons uma F G I J L 2 H Via Cad ibon a 1 D M A E B K O Via del Bracco N Observed Attributes 25 residential 12 non-residential 15 residential 1 not used 47 from lac 1 from lifa 1 from rnc 50 male 58 female

Summary data for house number Via Cadibona 6 List/input Households People 56 Building E Attributes Variation 53 da lac 1 da lifa 2 da rnc -3 Via Afonsine 51 from LAC 1 from LIFA 1 from RNC 61 male 65 female 126 Via Cadibona 6 Viale Sempione Attributes 53 -5 131 E Observed Stairwells floors 8 Building E Residential Interiors 3 Not-residential Interiors 56 Occupied dwellings 53 beyond enumeration area: summary data by house number 2 Unoccupied dwellings 3

349 346 Via Futa to Via Colfiori 348 D G I A C Via del B racco 350 Via d ella C onsu ma A E D 2 Via B E 354 356 Viale Sempione 357 N A Cad ibo na H D M E 29 Viale Sempione Data related. Buildingcrosses access on both sides of Cadibonatonumbers with 7 enumeration House. Street on Cadibona Street missing in the cadastral the whole streetmap related buildings areas Street and beyond enumerationa area: summary data by street circulation area K O c de racco Via del Bra c Via Afonsine uta Via F 347

Summary data by Street Cadibona Street List/input House numbers 20 Variation Observed +16 36 Buildings 18 +1 19 Households 37 -3 34 People 81 +1 82 Attributes 21 residential 15 not-residential 16 residential 2 commercial 1 not used 33 from LAC 0 from LIFA 1 from RNC 35 male 47 female

thanks for your attention email contacts for more detailed information and documentation: Francesco Di Pede: dipede@istat. it Damiano Abbatini: abbatini@istat. it ISTAT Dipartimento dei censimenti generali degli archivi amministrativi e dei registri statistici