1. PRESENTATION BY STATISTICS SIERRA LEONE ON THE USE OF GPS TO DESIGN ENUMERATION AREAS: A CONVENIENT SOLUTION FOR DEVELOPING NATIONAL SAMPLING FRAMES

2. GEOGRAPHY OF SIERRA LEONE
GEOGRAPHIC COORDINATES
8 30 E, W
AREA
71,740 SQ KM
POPULATION
4,976,871
(2004 CENSUS)
CLIMATE
DRY SEASON DEC-APR
WET SEASON MAY-DEC
NATURAL
RESOURCES
DIAMOND,TITANUM ORE,BAUXITE,IRON ORE,GOLD,CHROMITE.

3. DATA COLLECTION
Georeferencing of urban and rural maps at scales of 1:25,000 and 1:50,000 respectfully.
Printing of maps with UTM co-ordinates for use in the field.
Collection of GPS (Garmin 12) co-ordinates of the following
Localities
Administrative boundaries
Educational institutions
Health facilities
Other social facilities eg. Churches,mosques etc.

4. DATA CAPTURE
Fair drawing and demarcation of enumeration areas and administrative boundaries using GPS co-ordinates and natural features.
Data entry of GPS co-ordinates using excel
Conversion of GPS co-ordinates into dbase iv for processing in Arcview
Scanning of map sheets using AO scanner.
On-screen digitization of administrative boundaries down to EA level.
Editing and cleaning of EA shapefile using ArcEditor.
Linking of census database to EA shapefile for analytical planning with respect to health,education,agriculture etc.

5. ATTRIBUTE DATA OF AN EA
CHIEFDOM
SECTION
EA NO
LOCALITY
UTM EASTINGS
UTM NORTHINGS
DEA
BAIWALLA
TAMBEYAMA 1
316971
886981
TAMBEYAMA 2
316529
887357
JORU
317538
883776
NYANDEHUN
318742
884528

6. POINT DATA OF ENUMERATION AREAS

7. DIGITIZED EA DATA BASE (9,671 EA’S)

8. CENSUS DATA LINKED TO EA SHAPE FILE
EA NO.
DIST
DIST.CODE
CDOM
CDOM CODE
SEC
SEC.CODE
MALE
FEMALE
TOT.POP
H/H
KAILAHUN 11
1101
DEA
BAIWALLAH
110101
126
149
275 68
182
244
426 96
197
231
428 89
192
203
395 72

9. USE OF EA DATA BASE National sampling frame
Delimitation of electoral wards
Reproduction of constituency maps
Reproduction of administrative maps (District,chiefdom and sections)
Spatial distribution of health and educational facilities

10. THANK YOU FOR LISTENING