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Track: Health Care Services
Allen Hightower
National Centers for Disease Control and Preventio
4770 Buford Highway
Chamblee, GA 30341
Telephone: 770-488-7731
Fax: 770-488-7737
E-mail: awhl@cdc.gov
Maurice Ombok, Richard Otieno, Richard Odhiambo, Aggrey Oloo, Altaf Lall, Bernard Nahlen, William Hawley
A Geographic Information System Applied to a Malaria Field Study in Western Kenya
Defining Issue: Creation of a highly accurate map of a large study area for operational use and linkage to research data. GIS Solution: Differential GPS and vector-based GIS. Methodology: GIS and GPS-This paper describes use of the global positioning system in differential mode (DGPS) to obtain highly accurate longitudes, latitudes, and altitudes of 1,169 houses, 15 schools, 40 churches, four health care centers, 70 major mosquito breeding sites, ten borehole wells, seven shopping areas, major roads, streams, the shore of Lake Victoria, and other geographic features of interest associated with a longitudinal study of malaria in 15 villages in western Kenya. The area mapped encompassed approximately 70 square km and included 42.0 km of roads, 54.3 km of streams, and 15.0 km of lakeshore. Location data were entered into a geographic information system for map production and linked with various databases for spatial analyses. Spatial analyses using parasitologic and entomologic research data are presented
as examples. Background information on DGPS is presented, along with estimates of effort and expense to produce the map information. Information on a second project covering an area larger than 200 square kilometers, where over 7,000 compounds have been mapped to date using a GPS base station with carrier-phase differential processing, will also be presented. Software: Atlas GIS, SAS, FoxPro, AutoCAD.
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