Philippines
2007 Census of
Population
Data Processing
Valentino C. Abuan
Director, Information Resources Dept.
National Statistics Office (Philippines)
UN Regional Workshop on Data Processing, Bangkok, 15-19 Sep 2008
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B
ackground on POPCEN 2007
Conducted in August 2007
(a rainy month)
Originally targeted in 2005 as
a mid-decade census
Did not include housing questions
Interviewers hired; non-teachers
Population count: 88.57 M,
proclaimed in April 2008
UN Regional Workshop on Data Processing, Bangkok, 15-19 Sep 2008
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C
ensus Forms
CP Form 1 – Listing Sheets
CP Form 2 – Household Questionnaire
CP Form 4 – Institutional HH Quest
CP Form 5 – Barangay Characteristics
CP Form 7 – Self-Administered Quest
UN Regional Workshop on Data Processing, Bangkok, 15-19 Sep 2008
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P
rocessing Centers
Provincial Processing Stations
(80 sites)
Regional Data Processing Centers
(17 sites)
Central Data Processing Center
(2 sites)
UN Regional Workshop on Data Processing, Bangkok, 15-19 Sep 2008
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P
rovincial Processing Tasks
Manual document preparation and
batching
Manual Coding for CP Forms 2, 4 & 7
- Place of school
- Highest grade
- Occupation
- Place of work and residence
Coding Verification
- 20% sample for Forms 1, 2 and 4
- 100% verification for Forms 5 and 7
(more)
UN Regional Workshop on Data Processing, Bangkok, 15-19 Sep 2008
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P
rovincial Processing Tasks
(Continuation)
Data Entry (using CSPro)
- CP Form 5 (Barangay Characteristics)
- CP Form 7 (Self-Administered Quest)
Completeness & Consistency Checks
(CP Form 1 vs. CP Forms 5 and 7)
Transmittal of Documents and Files to
Regional DP Centers
UN Regional Workshop on Data Processing, Bangkok, 15-19 Sep 2008
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R
egional Processing Tasks
Document Receipt and Control
Document Scanning (Forms 2 and 4)
- used Kodak i610 scanners
Image QA
- Form recognition
- Visual check for dark, blurred, blanks, folded, etc.
(more)
UN Regional Workshop on Data Processing, Bangkok, 15-19 Sep 2008
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R
egional Processing Tasks
(Continuation)
1st Pass Capture from Images
- Interpretation/recognition of mark fields
- ICR-based interpretation/recognition of geographic &
household ID fields with 100% key verification
- Used Eyes and Hands for Forms (EHF) software
Consistency check (certification pass)
of CP Forms 5 and 7
Completeness Check (CP Forms 2 & 4)
Transmittal of Files in DVD to Central
DP Center
UN Regional Workshop on Data Processing, Bangkok, 15-19 Sep 2008
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C
entral Data Processing Tasks
Receipt and Control (DVDs and Files)
Image Check (visual)
2nd Pass Capture from Images
- Concentrates on write-in fields
- Uses key-from-image method
- Software: Custom-made using Visual Basic
Edit/Imputation
Tabulations
Creation of Microdata Public-Use-Files
UN Regional Workshop on Data Processing, Bangkok, 15-19 Sep 2008
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ICR Use: 2000 CPH and 2007 POPCEN
Characteristics
2000 CPH
2007 POPCEN
Scanners
Kodak 3900D (22 units)
Kodak i610 (22 units)
Software
Eyes and Hands for Forms
(EHF)
EHF (same version used in
2000 CPH)
Scanning Sites
4 Data Capture Centers
(3 regional + 1 central)
Regional DP Centers
(17 sites)
Data Capture
Strategy (from
images)
Capture on Single Pass
(all fields captured thru
ICR in the same pass;
done in all the 4 Data
Capture Centers)
Capture on Two Passes
(1st pass on mark fields and
ID fields done in Regional DP
Centers; 2nd pass on write-in
fields via key-from-image
done centrally)
ICR Application
Developer
System Supplier
In-House Staff
(more)
UN Regional Workshop on Data Processing, Bangkok, 15-19 Sep 2008
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ICR Use: 2000 CPH and 2007 POPCEN
(Continuation)
Characteristics
Problems
encountered
2000 CPH
•Emphasis on clear and
legible entries led to some
amount of rewriting into
new quests
•Unanticipated quest
shortage led to reprinting
of additional quests
2007 POPCEN
•Prescribed/provided pencil
lead not used by some
•Image QA not strictly
implemented by some reg’l
DP centers
•File corruption in image files
during DVD writing
•New reprinted quests did
not exactly match the
defined form templates for
ICR
•False recognition issue
UN Regional Workshop on Data Processing, Bangkok, 15-19 Sep 2008
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Census counts available at:
http://www.census.gov.ph
Thank You!
UN Regional Workshop on Data Processing, Bangkok, 15-19 Sep 2008
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