UN workshop for South Asian countries on collection & dissemination of socio-economic data from population & housing censuses New Delhi,28-31 may 2012 Janaka Rajapaksha Department of Census and Statistics(DCS) Sri Lanka Use of GIS Mapping & Spatial Analysis Country Presentation – Sri Lanka
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Janaka Rajapaksha Department of Census and Statistics(DCS) Sri Lanka
UN workshop for South Asian countries on collection & dissemination of socio-economic data from population & housing censuses New Delhi,28-31 may 2012. Use of GIS Mapping & Spatial Analysis Country Presentation – Sri Lanka. Janaka Rajapaksha Department of Census and Statistics(DCS) - PowerPoint PPT Presentation
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UN workshop for South Asian countries on collection & dissemination of socio-economic data
from population & housing censusesNew Delhi,28-31 may 2012
Janaka RajapakshaDepartment of Census and Statistics(DCS)Sri Lanka
Use of GIS Mapping & Spatial Analysis
Country Presentation – Sri Lanka
OutlineCensus Mapping
-Pre Enumeration Stage-Preparation of based maps
- Enumeration
-Post EnumerationData Dissemination using Thematic mapsData Dissemination through Web-using maps Spatial Analysis
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Census Mapping- Pre Enumeration Stage Technologies Used for preparing base maps in 2010 Round Census
- Use GIS related software(Arc map/Arc info)
- Satellite images
- Digital maps
- GPS Equipments - GPS Pints were taken for unclear boundaries
- Digitized GN division Boundaries in 2001 census
Census Mapping- Pre-Enumeration Stage - Used Satellite images
Census Mapping- Pre-Enumeration Stage - Used Digital maps
Census Mapping- Pre Enumeration Stage - Used Digitized GN division Boundaries in 2001 census
Census Mapping- Pre-Enumeration Stage -Used GPS in census mapping
Census Mapping- Pre-Enumeration Stage -prepared GN Division Map(2011)
Small Area Statisticsby Census Blocks (CBs) - MRCB
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MRCB Data Base
Enumeration Area Coding
2001• A1 : Province & District: (2)• A2: Polling Division(3)• A3: DS Division:(2)• A4: GN Division(3)• A5: Sector(U/R/E)(1)• A6: MC/UC/PS:(2)• A7: Ward/Village/Estate:(3)• Census Block No: (2)
2011• A0: (5)
1 1 0 1 2 0 9 1 2 5 2 3 2 2 0 7 0 6
1 0 0 0 1
9 8 6 6 0
Census Mapping- Pre Enumeration Stage -Prepared Census Block Map(2011)
Sri Lanka
Provinces (9)Districts (25)
Divisional Secretariat Divisions (330)
GND’s (14,022)
Illustration of nested Administration Hierarchy of sri Lanaka
Census Blocks (65,012)
Modes of Data Dissemination
Printing : Departmental Publications
Electronic Media (CD ROMs and DVDs)
Census Info/ Dev info
Internet : Web site Static web pages (html, PDF, excel)Interactive online tools (tabulating/graphing/mapping tools, etc) Census Info
Geographic information systems (GIS)
Population and pop- density Patterns by Districts-2001
Population and pop- Density Patterns by DS Divisions-2001
District Level Population By sector wise and Ethnic grups-2001
Legend Urban Rural Estate
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Population density Patterns of colombo District-2001
Analysis using Thematic Maps-
Ranking DS Divisions by Poverty -2006
Analysis using Thematic Maps-Classification of GN Divisions by Selected Unsatisfied Basic Needs(UBN): 2007
Analysis using Thematic Maps-Tsunami Mapping
Thematic Mapping- Data Dissemination through Web
Spatial Analysis -Multiple Buffers
Spatial Analysis – Use of GIS for Site Selection -Selection of Lands for Construct Southern Highway