1 / 22

Contemporary Practices in Census Mapping and GIS Use

This expert group meeting discusses the concept of digital census mapping and various implementation approaches, including the use of GIS, GPS, and digital imagery. It explores the integration of geospatial technologies in the census cycle and the critical success factors for successful implementation.

edwardg
Download Presentation

Contemporary Practices in Census Mapping and GIS Use

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Expert Group Meeting on Contemporary Practices in Census Mapping and Use of GIS 29 May -1 June 2007 New York Digital Census Mapping Process: a conceptual framework and different implementation approaches United Nations Statistics Division

  2. Summary • Introduction-Mapping “Revolution” • Census Mapping Process: Conceptual Framework • Different Implementation Approaches • GIS, GPS, Digital Imagery: More integrated • Institutional/Organizational Issues • Critical Success Factors • Concluding remarks

  3. Introduction • Mapping “Revolution”: • Shift: Manual to Digital • Paper map vs GIS map • Static vs interactive • User needs: increasing demand • NSOs and Geospatial Technologies: • Full advantage vs slow adoption • Real issue: integration for improvement

  4. Census Cycle Pre-Census (Pre-enumeration: Maps provide cartographic basis for the delineation of EAs) Census (Enumeration: Maps support data collection, monitoring) Post-Census (Post-enumeration: Maps make it easier to analyze, display and disseminate)

  5. Geographic Information Process (illustration) Acquisition Aerial Photography Surveying. Maps Remote Sensing GPS Census & Surveys Management/ Analysis GeographicDataBase GIS Internet Display/Dissemination

  6. Census Mapping Process: conceptual framework • Census Mapping Operations: A Geographic Information Process • Different Mapping Needs at the three stages: • Pre-enumeration • Large-scale maps for delineation of EAs • Enumeration • Large-scale maps for enumeration • Mid-scale for monitoring • Post-enumeration • Mid and Small-scale maps for dissemination

  7. Pre-enumeration stage Pre-enumeration (EA Map Production) Large-scale maps EA units Geocoding System Census Database Digital Mapping GIS Satellite Imagery Aerial Photo. GPS

  8. Census Enumeration Stage Pre-enumeration (EA Map Production) Large-scale maps EA units Geocoding System Census Database Digital Mapping GIS Satellite Imagery Aerial Photo. GPS Large-scale mapsLarge & mid-scale for sup. Mid- & small-scale for manag. Admin./Statistical Units GPS GIS Digital Mapping Enumeration (Census Data Collection)

  9. Post-enumeration Stage Mid- & small-scale maps EA update Statistical Database Databases (Maintenance) GIS Internet Mapping (Map Server) Digital Mapping Pre-enumeration (EA Map Production) Large-scale maps EA units Geocoding System Census Database Digital Mapping GIS Satellite Imagery Aerial Photo. GPS Large-scale mapsLarge & mid-scale for sup. Mid- & small-scale for manag. Admin./Statistical Units GPS GIS Digital Mapping Post-enumeration (Census Data Dissemination) Enumeration (Census Data Collection)

  10. Geospatial Technologies at all stages Pre-census Census Post-Census (Enumeration) (Post-enumeration) (Pre-enumeration) Digital Mapping Digital Mapping Statistical Database Census Database Databases Maintenance GIS GIS Aerial Photo. GIS Satellite Imagery GPS Internet Mapping GPS Administrative and Reporting Units EAs Units

  11. Different Implementation Approaches • Various combination of geospatial tools: depend on the approach chosen by NSO (needs vs resources) • Three main approaches: • Post-census • Full Census Program • Mixed Approach

  12. Post-Census Approach Pre-census Census Post-Census (Enumeration) (Post-enumeration) (Pre-enumeration) Digital Mapping Databases Maintenance GIS Internet Mapping Administrative and Reporting Units

  13. Post-Census Approach • No extensive work under pressure • Need can be limited for maps with administrative and reporting units • Learning Process • Early planning exercise

  14. Full Digital Census Mapping Program Pre-census Census Post-Census (Enumeration) (Post-enumeration) (Pre-enumeration) Digital Mapping Statistical Database Digital Mapping Census Database Databases Maintenance GIS GIS Aerial Photo. GIS Satellite Imagery GPS Internet Mapping GPS Administrative and Reporting Units EAs Units

  15. Full Digital Census Mapping Program • Development of an EA Database • Rudimentary digital maps • Geo-referenced EA maps • Reference layers: roads, rivers, Landmarks, etc. • Digital Postal Address registry • Digital Database of dwelling units • Statistical Database • GIS and Internet-based Dissemination

  16. Mixed Approach Pre-census Census Post-Census (Enumeration) (Post-enumeration) (Pre-enumeration) Digital Mapping Digital Mapping Statistical Database Census Database Databases Maintenance GIS GIS Aerial Photo. GIS Satellite Imagery GPS Internet Mapping GPS Administrative and Reporting Units EAs Units

  17. Mixed Approach • Combination of existing maps + satellite imagery + aerial photos: up-to-date maps for major cities (or regions) for EAs + traditional techniques for other cities and rural areas • Geographic Database: Evolving Prototype

  18. Recent Technological Developments • GPS: Greater accuracy, reduced cost, waypoints displayed real-time in a GIS software; • Satellite Imagery: Higher resolution, positional accuracy, and GIS-readiness; • Digital Arial Photo: extending its scope to small urban areas • Mobile GIS: Capture, manipulate, analyze and visualize data in the field in real time; • GIS+GPS+ Image Processing:Better integration.

  19. Institutional/Organizational Issues • A specialized in-house Cartography/GIS unit • Building technical and human capacities • National Spatial Data Infrastructure (NSDI) • Basic data • Population Datasets and Geocoding System: basic components

  20. Critical Factors • Ensuring Commitment for a long-term digital census mapping program; • Conducting a comprehensive needs assessment; • Tailor-made methodology of integration; • A Permanent unit for Cartography/GIS within the NSO; • Partnership and cooperation; • Capacity Building for sustaining the census mapping program.

  21. Concluding Remarks • For 2010 the P&R recommended the use of Geospatial technologies for improving traditional methods of census mapping • Digital Census Mapping Process: spanning all the stages of census data collection, analysis and dissemination • Implementation Approach: each country has to find its own best possible solution • Best Practices - Revision and Update of the Handbook on GIS and Digital Mapping

  22. Thought of the day: GIS, GPS and Remote Sensing bringsenseto censuses!

More Related