Philippines 2007 Census of Population Data Processing Valentino

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 1

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 2

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 3

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 4

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 5

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 6

R egional Processing Tasks Document Receipt and Control Document Scanning (Forms 2 and 4) - used Kodak i 610 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 7

R egional Processing Tasks (Continuation) 1 st 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 8

C entral Data Processing Tasks Receipt and Control (DVDs and Files) Image Check (visual) 2 nd 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 9

ICR Use: 2000 CPH and 2007 POPCEN Characteristics 2000 CPH 2007 POPCEN Scanners Kodak 3900 D (22 units) Kodak i 610 (22 units) Software Eyes and Hands for Forms (EHF) EHF (same version used in 2000 CPH) 4 Data Capture Centers (3 regional + 1 central) Regional DP Centers (17 sites) Scanning Sites Data Capture Strategy (from images) ICR Application Developer Capture on Single Pass Capture on Two Passes (all fields captured thru ICR (1 st pass on mark fields and in the same pass; done in ID fields done in Regional DP all the 4 Data Capture Centers; 2 nd pass on write-in Centers) fields via key-from-image done centrally) System Supplier In-House Staff (more) UN Regional Workshop on Data Processing, Bangkok, 15 -19 Sep 2008 10

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 11

Census counts available at: http: //www. census. gov. ph Thank You! UN Regional Workshop on Data Processing, Bangkok, 15 -19 Sep 2008 12