Janusz DygaszewiczDirector of Programming and Coordination

of Statistical Surveys Department

Central Statistical Office of Poland

UNECE Workshop on Statistical Data Collection

Washington DC, USA, 29 April – 1 May 2015

Methods of data collection

CorStat System – supporting process of collecting data

Transformation of administrative data to statistical data

Processing data

A geographic information system (GIS) as a tool to support,

monitor and control the work of interviewers in the field

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CAWI

• Computer Assisted Web Interview

• Reporting Portal for legal entities, organizational entities without

legal status and persons conducting economic activity businesses

CAII

• Computer Assisted Internet Interview

• for individual persons selected for participation in surveys

CATI• Computer Assisted Telephone Interview

CAPI• Computer Assisted Personal Interview

REG• Administrative sources

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CAWI - Reporting Portal

data validation and correction by the reporting person and

the statistician during data collection

monitoring of the report’s completion

notification of the approaching report submission deadlines

and reminders in electronic format

communication between the reporting person and the

statistician

savings - elimination of paper questionnaires

faster data processing - no entering data from paper

questionnaires

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0

100 000

200 000

300 000

400 000

500 000

600 000

700 000

October

2008

January

2009

December

2009

June 2011 August

2012

October

2014

April 2015

33 745

202 641

359 573

559 883

643 190 661 719700 000

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persons answer survey questions using the

application available online on the Internet;

implemented for agricultural surveys;

and social surveys, like household budget survey:◦ CAII also support not only respondents but also

interviewers, e.g.:

the interviewers have an option of remote preview of

the form completed independently by respondents,

the interviewers actively assist the respondents,

quickly explaining possible mistakes.

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currently implemented in all agricultural surveys and

in most social surveys;

scheduled as the first or the second (following CAII)

channel of collecting data;

working posts of telephone interviewers - located in

separated Call Center studies;

telephone interviewers - provided with professional

equipment.

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agricultural surveys ◦ the third channel of data collection in agricultural surveys,

in the case of failure to obtain a complete set of data via

CAII and CATI channels

social surveys ◦ direct interviews in households (first or second channel)

where such a way of proceeding results from adopted

methodology or

whose members has not expressed consent for a telephone

survey

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• CAII - Computer Assisted

Internet Interview,

• CAPI - Computer Assisted

Personal Interview,

• CATI - Computer Assisted

Telephone Interviewing.

CAxI

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CAXI

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HTC Touch Pro2

Screen

◦ touch-screen

◦ size 3,6’’

◦ resolution 480 x 800 pixels

◦ sliding, tilting - convenient usage

sliding, 5-rows QWERTY keyboard

GSM/GPRS/EDGE/UMTS/HSPA

GPS module

camera - 3,2 MP

Windows Mobile® 6.5

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CORstat system:

◦ controlling surveys flow between channels and

interviewers – to avoid double counting or omission;

◦ automated analysis process of interviewers’ workload;

◦ reasonable allocation of tasks for interviewers;

◦ monitoring and control of interviewers work in the field;

◦ monitoring the course of the survey including remedial,

emergency actions and creation of reports;

◦ first implemented in the last Population Census.

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◦ as a direct source of census data

◦ for personalisation of questionnaires

◦ to create:

compilations of buildings, dwellings and

persons,

an address-residence register

a sampling frame

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Data from administrative systems was used in the census:

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Preliminary preparation of an administrative register1) Importing

2) Mapping

3) Simple deduplication

4) Denormalisation

Data transition• The processing of identification and address variables• The processing of substantive variables

Validation and adjustment

Integration

Complex deduplication

The selection of statistical variable value from many registers

Statistical Data Set

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Portal

XML

TXT

Registry 1

Metadata server

OperationalMicrodata

Base

Registry 2

Registry nAnalitycalMicrodata

Base

ETL Tools

CAXI

XML

Files

Statistical

Files

Golden

Record

Metadata MetadataMetadata

SDMX

Questionaries

Integration with Census Frame and CAxI data,

Validation,

Correction,

Operational Imputation,

Transfer proper values to Golden Record,

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Registers 1..n

CAxI

Golden Record

OMB Layers

AMB

In 2010 Census Round a combination of data coming from sample surveys and administrative registerscontaining spatial data (including x,y coordinates) was used for the first time

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2010

Census

Round

registers

containing

spatial data

administrativ

e sources

Population

and Housing

Census 2011

•update in

municipalities

• WEB map service

• on-line editing

• visual pre-census

survey by

enumerators

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Statistical address points

•address points for residential

buildings

Statistical distribution

boundaries

•statistical regions

•enumeration areas

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Map module - GIS◦ Ortophotomap

◦ Cadastral Data

◦ Assigned Tasks

◦ Started Tasks

◦ Completed Tasks

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Questionnaire completeness analysis

Enumerator monitoring activity in the field– using

GPS/GIS technology

◦ Census Progress

◦ Localization and route

Emergency situation management

◦ Providing help for enumerators

Providing necessary information to enumerators

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GIS technology is used not only at the stage of data

collection but also for:

conducting spatial analysis;

further dissemination of survey results via

Geostatistics Portal

http://geo.stat.gov.pl//

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European Forum for

Geography and Statistics

represents a professional network of experts

cooperating within the framework of the ESS

to create a common geostatistical data

infrastructure and work out the best practices

in collecting, producing and disseminating

georeferenced statistics

Census in 2002

180 thousands of census enumerators

120 mln of questionnaires

1 000 tons of papers

At the end shredding

census questionnaires

Census 2011

18 thousands of census enumerators

0 questionnaires

0 tons of papers

ca. 50 mln € less

better data the more reliable results statistical surveys in the

future

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Janusz Dygaszewicz

Central Statistical Office of Poland