The Geographical Information Systems (GIS) unit mainly serves
the requirements of census and survey operations in the
provision and updating of maps. Presently this unit is using
orthophoto base maps which dates back to 1999 to update land
structures (mainly housing) which are drawn manually during
field exercises. These are then systematically coded and
digitized for the update of the Geo-referenced dwelling frame.
The objective of such a frame is that it provides an up-to-date
sampling frame needed for conducting household based surveys and
censuses. A quality census starts with clearly locating all
dwellings in the country. This enables every household to be
visited, thus ensuring complete coverage of every person in all
parts of the country. The geo-referenced dwelling frame provides
the location of each dwelling and is used for the delineation of
enumeration areas. It also provides a list of household heads
against which census data is collected. Other uses include
matching and cross-checking census reco