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Map-based Data Dissemination f or Philippine Census

This project focuses on the use of maps to disseminate data from the recent Philippine censuses. It includes the use of GPS units, digital databases, map tools, and resources to improve the accuracy and accessibility of census data. The aim is to provide a web-based dynamic table generation facility with map-based presentation capabilities. The National Statistics Office (NSO) plans to implement a rolling program to sustain accurate map buildup and funding for mapping activities.

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Map-based Data Dissemination f or Philippine Census

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  1. Map-based Data Dissemination for Philippine Census Valentino C. Abuan Director, Information Resources Dept. National Statistics Office (Philippines)

  2. Recent Philippine Censuses • 2007 Census of Population- Conducted in Aug 2007 • Counts proclaimed in Apr 2008 • 2010 Census of Population and Housing (CPH)- Conducted in May 2010 • Currently undergoing data processing and evaluation • Counts expected for proclamation by Dec 2010 • Detailed characteristics on staggered basis starting 2011

  3. Maps used in 2010 CPH • For Enumeration Area (EA) Delineation • - GPS units used for coordinates of landmarks serving as reference points for the proposed EA • Due to limited no. of GPS units, only selected provinces were targeted and covered only barangays (villages) identified to have multiple EAs • Barangays with single EA and barangays belonging to non-GPS provinces relied on maps provided by local governments and sketch maps derived from previous census rounds

  4. Maps used in 2010 CPH • For Shape File Generation • - Provincial and municipal boundaries previously digitized from official maps (relatively accurate); digitization started after 1995 census • Barangaymaps digitized from predominantly sketch maps

  5. Planned Geo Database • PostGIS • Extension to the PostgreSQL database server to provide geographic object support suitable for GIS requirements • PostgreSQL and PostGIS are both free and open-sourced products • Geo database is essential to the NSO as the organization continues to build and improve its map resources

  6. Map Tools and Resources • Google Earth images • NSO defined its own grid system • Grid is superimposed on the Google Earth image to subdivide it into smaller and manageable blocks for downloading • Downloaded image blocks served as reference for ground verification and GPS reading of identified landmarks GPS Units - 80 units initially; 690 units added after the census fGIS (Forestry GIS) - Freeware software for editing shape files

  7. Planned Data Products Atlas Public-Use-File w/ shape files and viewer software included Product packaged in DevInfo; may include other related indicators and previous data

  8. Desirable Service • Web-based dynamic table generation facility with map-based presentation capabilities • Currently under research • Preferably using open-source tools and hosted on Linux platform

  9. Map Improvement Sketch maps for dissemination often limited to thematic presentation Accurate maps important for spatial analysis NSO to embark on a “Rolling Program” as strategy to sustain accurate map buildup

  10. Rolling Program for Maps Gradual build-up of accurate maps using GPS Mapping activity to be included also in recurring surveys and not just during censuses Funding for mapping to ride on budget of recurring surveys

  11. Thank You! NSO Website: http://www.census.gov.ph

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