Reform and Application of GIS in
Surveys and Data Dissemination, a case
of National Bureau of Statistics,
Nigeria
By
Elisha FAFUNMI
Head, Research & Policy Analysis
National Bureau of Statistics, Nigeria
Outline
The Reform
Application of GIS in Surveys and Data
Dissemination, the Case of NBS, Nigeria



GIS in Data Collection
Data Preseentation/Dissemination
Challenges
The areas of reform process
Infrastructure and Equipment.
Human Resources Management and
Development.
Improved Data Production Methodology.
Data Management, Dissemination and
Access.
NBS Applications
Market
Outlets
MDA Database
Frame of
Household
Enterprises
`
Establishment
Survey
NBS Geo Databases
Year Book
Database
Register of
Educational
Institutions
Ward Statistics
Database
Register of
Health
Institutions
NBS Programme for
NSS
NBS under NSDS is expected to create
a
Nigerian Data Nervous System
(NDNS)
By bringing all data producer and user Agencies together through a
Virtual Private Network (VPN) cloud similar in structure to the
Nervous system of the Human body and connected to the internet
NBS & Federal MDAs VPN Design
Energy
NPopC
Interior
NBS DC
Petroleum
CBN
Customs
Industries
Cycle name
Finance
Health
Information
& Comm.
Head of Service
Agric
Labour
National
Assembly
Education
Account General
Active
In progress
VPN Design to connect NBS &
Selected Public Users Organisations
NISER
Manufacturers
Association
Of Nigeria, MAN
NACCIMA
Centre for
Management
Development
Security
And Exchange
Commission
Presidency
National
Planning
Commission
MDG Office
National Assembly
.. an e-Statistics grid : MDA
connection to NBS
1
NBS Data
Center
SSA &
other
Connectio
ns
CPTC
Codex
Modem
Codex
Modem
LAN
CPTC
CPTC
Cisco
Router
Fibre Digital
Subscriber Line
DSL
Cisco
Router
CPTC
CPTC
CPTC
25
MDAs
State /MDA VPN Schematic
Diagram
23 July 2016
Dr. V.O. Akinyosoye
9
NBS Data Centre
Entrance to
Data Centre
Main Servers
Application of GIS in Surveys
and Data Dissemination
the Case of NBS, Nigeria
By
Biyi Fafunmi
Head (Research & Policy Analysis Unit), NBS
Planning: Strata & Stratification
•
Stratification by delineation of land areas into
land-use categories (strata).
•
The Primary Sampling Units (PSUs).
•
Using physical boundaries
Use of Satellite Spot Imagery
Spot satellite imagery was used to classify
the PSUs into strata.
Used primarily to ascertain where the
cultivated areas are present in the case of
Agric Survey within a LGA
Planning
• Conversion from Paper EA to Digital
N.T.C Leaf barn
Bapt Gramm Schl
Coop Building
U/C
N.T.C Leaf Barn
0437
U/C
Kem Clinic
U/C
U/C
0438
St. Thomas Church
004P/R/120
N.T.C Leaf Barn
Texaco Filling Station107 109
004P/R/98
0441
0440
0439
192
169
G.M004P/R/180
Shop
Strata Definitions
Strata Code
Description
11
High Intensity Agricultural >50% cultivated
20
Medium Intensity Agricultural 15-50% cultivated
31
Urban/Developed
40
Low Intensity Agricultural <15% cultivated
50
Non-Agricultural
62
Water
Screen Shot of Strata/cutting
polygon
Strata constructed
Spatial Analysis: Dissolve Frame and
obtain strata area totals
Done in ArcMap 9.2 – Using ArcToolbox



Area totals summed.
Area sums converted to Hectares and Sq
KM.
Total land in strata values used to create
sample allocation
Spatial Analysis: Stratification
Map
Sample allocations
•
A total of 600 points were selected for the pilot test.
•
These points were allocated to each of the first four strata.
•
A high percentage of the points were selected in the stratum
where more than 50 percent of the land is cultivated, and
•
a low percentage of the points were selected in the stratum
where less than 15 percent of the land is cultivated.
•
No points were selected in the non-agricultural land or water
strata.
Sample allocation contd.
stratum
stratum description
possible
sample
total land
based on sample
% of
(sq km) total land (ha) % of land % land points sample
11
agric land, >50% cultivation
21693.90
2169389.62
49.1%
294
350
58.3%
20
agric land, 15-50% cultivation
10019.37
1001937.45
22.7%
136
150
25.0%
31
agri-urban
334.84
33484.03
0.8%
5
20
3.3%
41
agric land, <15% cultivation
11710.74
1171074.26
26.5%
159
80
13.3%
50
non-agric land
360.52
36052.34
0.8%
5
0
62
water (min 1 sq km)
101.27
10126.90
0.2%
1
0
44220.65
4422064.59
600
600
TOTAL
Use Hawthorne Tools to allocate
sample points
Google: Hawth tools extension used for
sampling tools.
Random point sampling, allocate sample
by stratification category method was
used
Sample Allocation….
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Sample Allocation
Allocation of Sample by
Enumeration Station
Maps to aid enumerators
DS MapBooks tool



Overview map
Sample Points Map
Sample Allocation by Enumerator Map
GIS and Data Collection
Data Collection using Overview map
and GPS Technology
Sample Point Map
Zaria LGA: EA Imagery
converted to Digital map
Data Collection
GPS & Handheld
Computer
Micro data
Census & Survey
Macro data
MDAs Administrative
Statistics
Germin & Trimble
GPS
Farm area measurement
Automated Sector and
State Statistical
databases
HP iPaq handheld
Price Statistics
Handheld Computer for collecting
HH data
Data Collection Using
GPS/Hand Held Device : Agric
Survey
Data Presentation/
Dissemination
Methods
Data centre technique - VPN
Web
CD/ DVD/ USB storage
Mobile system
Hard Copies
www.nigerianstat.gov.ng
Mapping of Socio Amenities by smallest
administrative unit - WARD
Challenges
Current Satellite Imagery
Capacity Development
Institutional Problem
Cost of maintenance