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 AbbatiniISTAT

Dipartimento dei censimenti generali degli archivi amministrativi e dei registri statistici

Municipality Population Register (LAC – Liste Anagrafiche Comunali) used to organize and control the field work (mail out of questionnaires and check list of respondents);Supplementary lists of Auxiliary Sources (LIFA – Liste Integrative da Fonti Ausiliarie; RNC – Rilevazione dei numeri civici) used to control undercoverage of LACs;Short Form for a sample of households;Multi-Way Responses (Internet, postal carrier, hand-delivery).

15° Italian Population and Housing Censuses.Main strategic innovations:

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:

Geocode the municipality population registers LAC;Guide the enumerators in the field work;Retrieve the undercoverage of registers and non-response of households;Undertake 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.

GeoCiv: Experimentation on municipal address indexes to build-up municipal street indexes and address indexes

for RNC (urban areas of main cities);RNC: House number survey (urban areas of main cities);ANSC: Street indexes and address indexes national archives

(other areas of main cities and other municipalities).

GeoCiv Project

GeoCiv - 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 geo-coded to the census enumeration areas;

In collaboration with Poste Italiane (Italian Postal Service);

First step: elimination of duplicate or blank records and identification of qualifying attributes in the heterogeneous information received;

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.

RNC

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

ANSC (2010-2011) – Street indexes and adreess indexes National Archives in collaboration with Land Registry Office (Agenzia del Territorio – AdT). 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 AdT;

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

2006Feasibility study

2007

Testing of pilot areas

2007Presence Municipal Archives survey

2008GeoCiv project definition

2009/2010GeoCiv project implementation

2010/2011House number survey (RNC)

RNC

Framework of the activities

PORTALE PER I COMUNI

2009/2010 ANSC Project

• Updated aerial photos of the territory

• 2011 Enumeration Area’s boundaries

• Graph maps of commercial source

• ADT Cadastral mapping of buildings

RNC: field work tools data source

Municipal Archive of addresses INDIRIZZO SEZ2011

VIA LICONI 1 98VIA LICONI 3 98VIA LICONI 3 A 98VIA EMILE LEXERT 1 98

• GeoCiv house numbers archive

Address found by enumaratorVIA LICONI 5 98

Municipal Archive of addressesADDRESS SEZ2011 BUILDING CODE INTENDED USE

VIA LICONI 1 98VIA LICONI 3 98VIA LICONI 3 A 98VIA MONTE ROSA 1 98

RNC: buildings-addresses relationship

Via

Monte

Rosa

A residential

C residential

B residential

C residentialC not-residential

• Buildings 1 to 2 - 3 - 4 have been reported in the database by address

Identification of missing buildings in cadastral mapping

RNC: buildings enumeration

1

2

34

FG

IJ

D

L

A B

O

KE

MH

N12

Via del BraccoVia del Bracco

Via della Consuma

Via della Consuma

Via Cadibona

Via Cadibona

Via d

el Bracco

Via d

el Bracco

RNC: enumeration area

House numbers from municipal archiveHouse numbers from municipal archiveHouse number from surveyHouse number from survey

FG

IJ

D

L

A B

O

KE

MH

N12

Via del BraccoVia del Bracco

Via della Consuma

Via della Consuma

Via Cadibona

Via Cadibona

Via d

el Bracco

Via d

el Bracco

Summary data for enumeration area

Enumeration Area n. 357List/input Variation Observed Attributes

House number 22 +15 37 25 residential12 non-residential

Buildings 14 +2 16 15 residential 1 not used

Households 53 -4 4947 from lac 1 from lifa 1 from rnc

People 111 -3 10850 male58 female

beyond enumeration area: summary data by house number

Via CadibonaVia Cadibona

Via

Afon

sine

Via

Afon

sine

Viale SempioneViale Sempione

Summary data for house number

66

Via Cadibona 6Building E

List/input Attributes Variation Observed Attributes

Households 5653 da lac

1 da lifa 2 da rnc

-3 5351 from LAC 1 from LIFA 1 from RNC

People 131 -5 126 61 male65 female

Via Cadibona 6Building E

Stairwells floorsResidential

InteriorsNot-residential

Interiors

8 3 56 2EE

Occupied dwellings

Unoccupied dwellings

53 3

E

DG

B

A

IA C E A D

N

HM

D

E KO

2

beyond enumerationa area: summary data by street circulation area

Via ColfioritoVia Colfiorito

Via

Afo

nsi

ne

Via

Afo

nsi

ne

Via

Fu

taV

ia F

uta

Via

Fu

taV

ia F

uta

Viale SempioneViale Sempione

Via del BraccoVia del Bracco

Via della Consuma

Via della Consuma

Via d

el Bracco

Via d

el Bracco

Viale SempioneViale Sempione

347347

346346

348348

354354 356356

357357

350350

349349

ViaViaCadibona

Cadibona

2929

DataData  relatedrelated toto thethe wholewhole  streetstreetCadibona Street crosses 7 enumeration Cadibona Street crosses 7 enumeration areasareas

HouseHouse numbersnumbers  withwith accessaccess  onon bothboth sidessides  ofof CadibonaCadibona StreetStreet  andand relatedrelated  buildingsbuildings

Building on Cadibona Street missing in the cadastral Building on Cadibona Street missing in the cadastral mapmap

Summary data by Street

Cadibona StreetList/input Variation Observed Attributes

House numbers

20 +16 36 21 residential15 not-residential

Buildings 18 +1 19 16 residential 2 commercial 1 not used

Households 37 -3 3433 from LAC 0 from LIFA 1 from RNC

People 81 +1 8235 male47 female

thanks for your attention

email contacts for more detailed information and documentation:Francesco Di Pede: dipede@istat.it

Damiano Abbatini: abbatini@istat.it

ISTATDipartimento dei censimenti generali degli archivi amministrativi e dei registri

statistici