Planning and Implementing a Census Geospatial Programme Country Presentation: Bangladesh LIZEN SHAH NAYEEM Deputy Director Bangladesh Bureau of Statistics Statistics & Informatics Division Ministry of Planning
Presentation Outline • Introduction • Bangladesh Experience in Using Maps in the Censuses. Bangladesh Experience in Using Maps in the Censuses. • Use of GIS Maps in 2011 Census. • Mapping for the Upcoming 2021 Census
Introduction • The use of quality maps in census has a major influence on the quality and reliability of census data; • Maps play important role in ensuring full and unduplicated coverage of geographic areas. • Maps play a vital role in guiding enumerators to dwelling and places where people are likely to be during the enumeration period. • Digital maps play an important role in dissemination of census results by integrating GIS with Statistics • Digital maps used in conjunction with GIS technology is the basis for coding information generated in the census
Bangladesh Experience in Using Maps in the Censuses. • Maps are being used in censuses of Bangladesh since 1974 Census. • In 1974 Mouza maps were collected from Malaria Eradication Programme of the government and then Enumeration Blocks were created. • There were 95,208 Enumeration Blocks in the country and one enumerator was assigned to enumerate one Block.
Bangladesh Experience in Using Maps in the Censuses (contd.) • In 1981 census maps were collected from survey of Bangladesh, Department of land records, Municipality Offices, PDB, WAPDA, Town Committees and Malaria Eradication Programme. • The aerial photographs of 1975 conducted by survey of Bangladesh was also collected for census. • The whole country was divided into 2,11,751 Enumeration Areas (EA) for the census and one enumerator was assigned with one or more areas (villages/mouzas having less than 25 households were merged with the nearest EA and shown in the map)
Bangladesh Experience in Using Maps in the Censuses (contd.) • In 1981 the average size of Households in each EA was 80. • In addition geo-codes were assigned to each geographical areas including villages for unique identification of EA. • In 1991 census, the maps used in 1981 was updated for rural and urban areas with important landmarks and geocodes. The whole country was divided into 2,11,538 enumeration areas with on an average about 92 households.
Bangladesh Experience in Using Maps in the Censuses (contd.) • In 2001 census EA demarcation and concurrent EA mapping works was carried out in two phases starting from 1997. In the first phase EA demarcation and updating was done in urban areas due to complexity of boundary identification and dense population. In case of newly built areas new maps were prepared and EA was delineated. • In second phase maps were updated in the rural areas and new maps were prepared where necessary. • In 2001 as many as 2,62,000 EAs were created in the whole country and geo-codes were updated during mapping operation. The average size of household Per EA was 97
Use of GIS Maps in 2011 Census • BBS used the GIS maps in census operation in the history of BBS. • Maps were updated with GIS maps in two phases starting from May 2009 • In the first phase maps of rural areas were updated for union Mouza and control maps. • In the second phase urban area maps were updated as it is very difficult to identify proper boundary due to rapid change of urban settings.
Use of GIS Maps in 2011 Census(contd.) • Maps were finally checked during zonal operation and updated with proper boundary and used in main census, PEC and sample census (long questionnaire household survey. • The whole country was delineated into 2,96,718 EAs. The average size of EA was 108 households. • Using the GIS maps Small Area Atlas was prepared for the 64 districts showing lowest administrative areas (mouzas) and other higher geographic areas such as unions, upazila (sub-district) with geo-codes and basic information such as households, Population etc. • These Atlas were very much useful for local level planning and resource allocation
Mapping for the upcoming 2021 census • BBS is now planning for the next round census to be held in 2021, • More Sophisticated technology will be used in this census. • BBS is Planning to take satellite image for the next census for better coverage of new settlement particularly in the remote and hard to reach areas. • Moreover, GPS technology will also be used for the next census. • Integration of Statistics with geo-spatial information system will be done using 2021 census data as per recommendation of UN-GGIM