Use of Gps to Design Enumeration Areas: a Convenient Solution ...

Use of Gps to Design Enumeration Areas: a Convenient Solution ...

PRESENTATION BY STATISTICS SIERRA LEONE ON THE USE OF GPS TO DESIGN ENUMERATION AREAS: A CONVENIENT SOLUTION FOR DEVELOPING NATIONAL SAMPLING FRAMES GEOGRAPHY OF SIERRA LEONE GEOGRAPHIC COORDINATES 8 30 E, 11 30 W AREA 71,740 SQ KM POPULATION 4,976,871 (2004 CENSUS) CLIMATE DRY SEASON DEC-APR

WET SEASON MAYDEC NATURAL RESOURCES DIAMOND,TITANUM ORE,BAUXITE,IRON ORE,GOLD,CHROMITE . DATA COLLECTION 1. 2. 3. 4. 5. 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. 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. ATTRIBUTE DATA OF AN EA CHIEFDOM SECTION EA NO LOCALITY

UTM EASTINGS UTM NORTHINGS DEA BAIWALLA 01010101 TAMBEYAMA 1 316971 886981 TAMBEYAMA 2 316529 887357 JORU

317538 883776 NYANDEHUN 318742 884528 POINT DATA OF ENUMERATION AREAS DIGITIZED EA DATA BASE (9,671 EAS) CENSUS DATA LINKED TO EA SHAPE FILE EA NO. DIST DIST.CO DE CDOM CDOM

CODE SEC SEC.CO DE MALE FEMALE TOT.POP H/H 11010101 KAILAHU N 11 1101 DEA

BAIWAL LAH 110101 126 149 275 68 11010102 KAILAHU N 11 1101 DEA BAIWAL LAH

110101 182 244 426 96 11010103 KAILAHU N 11 1101 DEA BAIWAL LAH 110101

197 231 428 89 11010104 KAILAHU N 11 1101 DEA BAIWAL LAH 110101 192

203 395 72 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 THANK YOU FOR LISTENING

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