MODERN CENSUS in POLAND Group of Experts on

MODERN CENSUS in POLAND Group of Experts on Population and Housing Census Geneva, 28 -30 October 2009 Janusz Dygaszewicz Central Statistical Office in Poland

Agenda • • • New implementation – mixed model Acquisition of statistical data on-line Solution architecture The use of administrative sources Geo-coding Conclusions 2

Mixed Model for Population and Housing Census Mixed model - a combination of data from administrative sources with data acquired on-line from statistical surveys

Data collection channels • Administrative sources – including spatial data reference registers ON_LINE: • Self-enumeration by Internet – ( CAII – Computer Assisted Internet Interview) • Telephone Interview – ( CATI - Computer Assisted Telephone Interview) • Sample surveys (using hand-held terminals with GPS and GIS service – HTC Touch HD with GPS) – ( CAPI - Computer Assisted Personal Interview)

System Architecture – on-line channels Census Completeness Management Map Server Operational Microdata Base CAPI CAII CATI 6

Supervisor – main actor • Address Point and Census Area management • Data acquisition method choice (channels) – CATI – CAPI • Enumerator management – Census Area assignment – Address point assignment – Workday planning 7

Address point assignment

Supervisor • Questionnaire completeness analysis • Enumerator monitoring – Census Progress – Localization and trail • Census completeness monitoring • Emergency situation management – Providing help for enumerators • Providing necessary information to enumerators 9

Census Completeness Monitoring

Enumerator tracking

Hand-held terminal 12

Enumerator • Visiting all assigned holdings – Filling electronic questionnaires • Daily synchronisation • Contact with the supervisor in terms of task scheduling • Adding newly identified holdings 13

Enumerator 14

Enumerator • Map module - GIS – – – Ortophotomap Cadastral Data Assigned Tasks Started Tasks Completed Tasks 15

Enumerator • Alarm procedure – In emergency situations, enumerators have a possibility of sending an alarm signal to their supervisors – Alarm notice is sent to the supervisor application and via SMS to the supervisor 16

CENSUS Data Processing Infrastructure

Solution architecture Registry Gestors Public Zone Data Integration Data Normalization Data Depersonalisation Data Dissemination Public Zone Estimation Statistical ID Table Individual Orders Register A Operational Microdata Database Register B Microdata Database Input, Estimation, Definitions, Classification METADATA Spatial Analysis INTERNET Public METADATA Map Server CAPI CAII CATI 18

The Methodology of Linkage Data from Several Channels

The Census Model in Poland Register data Internet, CATI Imputation & calibration Population Enumerators Attributes not covered - imputation Attributes

The Census Model in Poland Sample Surveys Small Area Estimation Attributes Register data Internet, CATI Imputation & calibration Population Enumerators Estimation of whole population Estimation based on the sample surveys

The use of administrative sources in censuses • The following usage of administrative sources is being planned during the census: – direct source of research data , – source of information to create a list of entities covered by the census (addresshousing survey) , – in addition, a source of information for : • imputation, • data estimation, • comparison and determining the quality of the data. 27

In Poland exist several hundred registers, but 3 of them could be pointed as the base administrative registers

The name of the base register The name of the body responsible for administrative system Population Identification Register System: General Electronic System of Population Registration - PESEL, Ministry of Interior Affairs and Administration Registration files on the level Gminas’ offices, e. g. Commune/Municipal offices - Economy units and enterprises identification register called REGON Central Statistical Office - Territorial identification register – TERYT integrated with land building registers Central Statistical Office

• This 3 base registers deliver unified identification system across other different registers and make it possible to integrate almost all administrative sources. • Now, about 28 public registers were selected as administrative sources for census. • Territorial Identification Register - TERYT is the most crucial for public statistics.

x, y GEOCODING • Territorial identification registry (System TERYT) provides location data of all statistical units as the address-point of a related building • Location of buildings is specified using geographical x, y coordinates, giving the exact location of each building and make possibility to linking microdata from several registers.

• This will eliminate the necessity to recalculate data when administrative borders are changing. Furthermore, the point assignment will allow easy processing of statistical data in any chosen area - even for the GRID - GEOSTAT • x, y geocoding is crucial in all three stages of the census: • the preparatory works, • management of enumerators • and after the census for multidimensional spatial analysis.

Identification system for address point 7 XXXXXX X ID of administration levels 6 YYYYYYY ID of city, town, village 7 RRRRRR O ID of statistical area 5 UUUUU ID of street Building No. Dwelling No.

Identification system for spatial address point 7 XXXXXX X ID of administration levels 6 YYYYYYY ID of city, town, village 7 RRRRRR O ID of statistical area 5 UUUUU ID of street Building No. Dwelling No. x y

220 Statystyki PL 220 latlat Statystyki PL Dyrektor Projektu: J. Dygaszewicz 35 35

220 Statystyki PL 220 latlat Statystyki PL Dyrektor Projektu: J. Dygaszewicz 36 36

We expect that after the population census in 2011 spatial analysis, based on address point assignment, enable us to disseminate geostatistics data for more than 40 000 settlements in Poland

Good cooperation between statistical services and register-keepers are crucial for integration of administrative data for statistical purposes.

Instead of a conclusion Census in 2002 Census 2011 • 200 thousands of census enumerators • 20 thousands of census enumerators • 150 mln of questionnaires • 0 questionnaires • 1 000 tons of papers • 0 tons of papers • ca. 40 mln € less • At the end shredding census questionnaires • better data • the more reliable results • statistical surveys in the future 39

Central Statistical Office - Poland Thank you for your attention Janusz Dygaszewicz Central Statistical Office, Poland Director of Central Census Bureau j. dygaszewicz@stat. gov. pl