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Integration of GPS, Digital Imagery and GIS with Census Mapping

Expert Group Meeting to Review Critical Issues Relevant to the Planning of the 2010 Round of Population and Housing Censuses 15-17 September 2004 New York. Integration of GPS, Digital Imagery and GIS with Census Mapping. United Nations Statistics Division.

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Integration of GPS, Digital Imagery and GIS with Census Mapping

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  1. Expert Group Meeting to Review Critical Issues Relevant to the Planning of the 2010 Round of Population and Housing Censuses 15-17 September 2004 New York Integration of GPS, Digital Imagery and GIS with Census Mapping United Nations Statistics Division

  2. Integration of GPS, Digital Imagery and GIS with Census Mapping • GIS, GPS, Digital Imagery: More integrated • Census mapping operations: A geographic information process • Paradigm shift: Towards a digital census mapping approach • Current and future actions to promote digital census mapping approach

  3. Recent Technological Developments • GPS: Greater accuracy, reduced cost, waypoints displayed real-time in a GIS software; • Satellite Imagery: Higher resolution, positional accuracy, 3-day revisit frequency, and GIS-readiness; • Mobile GIS: Capture, manipulate, analyze and visualize data in the field in real time; • Combination with DV:Better integration.

  4. Geographic Information Process Three stages: • Data Acquisition • Data management • Data dissemination

  5. Geographic Information Process (illustration) Acquisition Aerial Photography Surveying. Maps Remote Sensing GPS Census & Surveys Management Dissemination GDB GIS

  6. Census Process Pre-Census (Pre-enumeration: maps ensure consistency, prepare) Census (Enumeration: maps support data collection, monitor) Post-Census (Post-enumeration: analyze, display and disseminate)

  7. GIS with Census mapping at all stages Pre-census Census Post-Census (Pre-enumeration) (Enumeration) (Post-enumeration) GPS Photo/Video GIS Digital Mapping Satellite Imagery GIS Digital Mapping GIS Internet (Map-Server) Administrative and Reporting Units EAs Units

  8. Geo-coding System • A unique code needs to be assigned to each EA example:02 025 0115 0033 Province: 2 digits District: 3 digits Locality: 4 digits EA: 4 digits • This Code: a natural link between GIS boundaries (geographic coordinates) and tabular census data  Geo-code • Coding system: well structured, flexible  Geo-coding System

  9. Digital Census Mapping Process vs Traditional Census Mapping Process • Digital Census Mapping Approch: common sense! • Paradigm Shift: • Up-to-date Approach • Continuous Mapping Process • Implications: reconsider the way to conduct censuses (periodicity of census, frequency of inter-censal surveys, coverage, etc.)

  10. Some Actions undertaken by the UNSD • Handbook on GIS and Digital Mapping, 2000 • Training Workshop for SADC and CIS regions • Advisory missions • ESRI Donation: commercial ArcView 3.3 to 40 countries

  11. Suggested Actions • Statistical Map Server • International Conference: “Integration of Geospatial Technologies with Census Mapping for Better Decisions” (Resolutions) • Guidelines to establish a Permanent Cartography & Geographic Information Unit within NSO • Establishment of a Group of Experts

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

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