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 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

Thank You