Census Mapping
A Case of Zambia
UN Workshop on Census Cartography and Management,
Lusaka, 8-12th October 2007
Presentation Outline
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History of Census Mapping in Zambia
Census Mapping Methodologies
Enumeration Area Demarcation Criteria
Role of GIS in the CSO
Challenges facing the Office with regards to mapping
Strategies for the 2010 Census Mapping
Urgent short term objectives of the 2010 CMP
Long term objectives of 2010 CMP
Imagery Coverage and costing
Spatial Data Availability for mapping
What we expect from the 2010 CMP
History of Census Mapping
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1977-1980 Census mapping for 1980 Census
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1987-1990 Census mapping for 1990 Census of Population
and Housing
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1998-2000 Census mapping for the 2000 round of Census
of Population and Housing
Census Mapping Methodology
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1980 and 1990 census mapping methods based on
manual methods with prismatic compasses and drafting.
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2000 Census GPS was used to update map features but
still manual plotting and drafting of maps was still
employed.
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2010 Census mapping method largely GIS based with
Imagery as the base map. GPS to be used to update the
locality listing and community infrastructures.
Enumeration Demarcation Criteria
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Household 60-100 hh or 300-500 people in rural EA’s and
100-150 hh or 600-900 people in urban EA’s
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Estimates based on the average rural hh size of 5 in rural
areas and 6 in urban areas
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Demarcation hierarchy/coding pattern tied to Province,
District, Constituency and Wards
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For 2010 Census Mapping a Locality name boundary file
to be created for dissemination of small areas statistics.
Role of GIS in CSO
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GIS has not been used in pre census cartographic
activities
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Technology widely used in the 2000 census analysis to
produce Census atlas and Thematic Maps
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All 2000 EAs were digitized and various administrative
geography created- province, district, constituency and
ward.
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GIS used to disseminate demographic data at these
levels
Challenges facing the Office with regards to
GIS use
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Inadequate integrated and properly designed data warehouse
and database
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Inadequate awareness within the organization on use of GIS in
statistical agencies
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Lack of adequate institutional support regarding maintenance
and sustainability of GIS
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Inadequate accurate geographic base data and Inadequate
equipment
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Skills development and training is needed to realize the
potential of GIS
Inadequate funding and operational assistance to make the
difference
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Strategy for 2010 Mapping Program
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Greater GIS data analysis and dissemination possibilities
Creation of an accurate administrative and statistical
boundary spatial database
Accurate, cost effective Census Mapping operations and
with the end result being accurate EA demarcation and
map creation.
Increasing the scope of statistics products
Further developing GIT capacity within the CSO
Fast-tracking relevant staff skills development
Acting as a corporate service provider to the CSO
Increasing the accuracy and effectiveness of census and
survey data collection
Time and Cost Saving due to decreased fieldwork
activities as a result of better survey and census
implementation methods.
Urgent short term implementation processes for the
CMP
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Establish an accurate cartographic base for creation of
accurate census and survey cartography
Essential to obtain high resolution satellite imagery to act
as an accurate and current geographic base from which
census mapping operations can be initiated. 2.5 meter
and 1 meter resolution for rural and urban respectively
Procure computer equipment to equip Head office and
Provincial Offices with GIS labs -14 PCs and 10 Large
Format Plotters procured by UNFPA
Procure additional equipment such as the A3 printers and
specifically the GIS Software for demarcation and image
server.
Train staff as well as the field staff in modern demarcation
methods concurrently with the database design and
installation of the GIS.
Long term objectives of 2010 CMP
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Providing census support during the enumeration and
processing phase
Playing an essential part in analysis and dissemination of
the Census 2010 information
Designing and implementing a poverty mapping program
To create a definitive Locality Name boundary set derived
from the EA boundaries
Continuing to produce accurate EA maps for survey taking
Progress tracking and logistics tracking center during the
2010 census
Investigating new ways of analyzing economic and sociodemographic statistics in the spatial context
Leading the statistics advocacy campaign to the users
through innovative analysis and dissemination techniques
The creation of an extensive Census Atlas for the 2010
Population Census
Satellite Imagery Coverage of Zambia
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301 Spot scenes cover Zambia
Estimated Costs of Imagery by Province
PROVINCE
# MAP SHEETS
COST PER SCENE
TOTAL IN EURO
Central
47
€ 9,700.00
€ 455,900.00
Copperbelt
13
€ 9,700.00
€ 126,100.00
Eastern
31
€ 9,700.00
€ 300,700.00
Luapula
28
€ 9,700.00
€ 271,600.00
Lusaka
10
€ 9,700.00
€ 97,000.00
North Western
52
€ 9,700.00
€ 504,400.00
Northern
45
€ 9,700.00
€ 436,500.00
Southern
33
€ 9,700.00
€ 320,100.00
Western
42
€ 9,700.00
€ 407,400.00
TOTALS
301
€ 2,919,700.00
Spatial Data Available for Mapping
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IKONOS 1m pan sharpened satellite imagery for a part of
Lusaka and the whole of Kafue towns.
The provincial, district, constituency, ward and national
parks boundaries are available in digital format.
The 2000 Census EA boundaries are available in digital
format. Census data is only linked to ward, constituency
and district level.
No digital topographic map sheets only hard copy maps
exist.
Digital point data regarding school and health facility
locations are also available, as well as transport and
topographic data.
What we expect from the 2010 CMP
An integrated GIS that will answer current CSO Challenges:
 Accurate geographic base to plan and implement
census and survey operations-increase accuracy of data
collection, increasing demand and profile of statistics in
the user community.
 Added analysis and dissemination possibilities (thematic
maps, etc) will enhance decision-making & advocate the
use of statistics and further increase the profile of statistics.
 Institutional capacity will be increased due to the added
dimension GIS brings to all the core processes within the
CSO. The Unit will act as Corporate service provider for the
whole organization.
 Master
sampling
frames
and
updated
survey
methodology increasing the accuracy of surveys and
census data
 Socio-demographic data collected more cost and time
effectively with fewer resources.
Sample Map of Digital EA Map for Zambia
End of Presentation
Thank you for your attention!
isikanyiti@zamstats.gov.zm