An overview of computerized GIS and SOME of its uses in satistical office
Author(s)/Corporate Author (s)Zewoldi, Yacob;
United Nations. Economic Commission for Africa;
African Statistical Association (ASFA).;
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The objective of this paper is to introduce Geographic Information System (GIS) to the novice and to point out some of its many possible applications in statistical offices and research institutes. GISs are computer systems that integrate spatial and attribute data. Sources of spatial data for a GIS are paper maps, aerial photographs and satellite images and that of attribute data are censuses, surveys and administrative records. A number of maps can be stored and analyzed through overlaying in GIS to find answers to complex questions based on common geographic occurrences. Most GISs are designed to store spatial data and link attributes to the stored features; to analyze these data on those attributes; model future scenarios, make predictions, and display spatially referenced data for solving complex planning and management problems.