Geographic Information Systems Essay

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A revolution of Geographical Information Systems (GIS) occurred in the mid- 1980s and this was characterised by massive innovations in the way geographic data was collected, stored, manipulated and managed (Openshaw and Openshaw 1997). Since GIS is an enabling technology, Cromley and McIafferty (2002) stated that striving to reach a consensus definition of GIS would be extremely difficulty. Longley et al (2001) however pointed out that the strength and prowess of GIS as automated systems in the way they enable the capture, storage, retrieval, analysis and in the display of spatial data. GIS has thus developed tremendously because it covers many fields and disciplines and has etched its way into our day to day working and living …show more content…
Slingsby (2011) explained how the OAC has a number of applications that can be used in profiling populations and structuring data. Basically the OAC is a geodemographic classifier used in identifying and describing groups of people as shown in the 2001 census. Callingham (2008) added that the 2001 Census Output Areas were specifically created for statistical purposes to enable future straight-forward mapping of areas, profiling of people and modelling of behaviour and attitudes in small areas where people live. This is now how GIS has grown from traditional scientific discipline. Slingsby explained how GIS can then be used for areal mapping for better visualisation, for profiling to understand the mix of people better, understanding who is using a service or not and most importantly how data can be fused with information from other sources to enhance meaning.
De Floriani et al (1996) contended that one of the strongest points of GIS as an emerging scientific discipline was its ability to represent spatial data in different resolutions. They explain further that GIS improves on traditional data collection models through the development of multi-resolution models for representation, manipulation and visualisations of terrain. Terrain models have been produced for specific purposes, but GIS has introduced different degrees of resolution in different parts of the models. This brings in an element of many levels of complexity in one model as it tries to portray the
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