A Geographical Information System (GIS) utilises specialised software for spatial analyses. Early computer programs for GIS were introduced in the United States in the late 1950s by the U.S. Census (Clarke 2002). In the early 60s the development of Canada Geographic Information Systems (CGIS) commenced, led by Roger Tomlinson, aiming to analyse Canada’s national geographic inventory. At about the same time, Howard Fisher developed Synagraphic Mapping System (SYMAP), a pioneering automated computer mapping application. He started these developments at the North-western Technology Institute, University of Chicago, and completed them at the Harvard Lab for Computer Graphics and Spatial Analysis. GIS has, for decades, been seen only as a software package which may help to accomplish spatially related analytical tasks. It is often associated with the software used for the implementation of a GIS technical structures and concepts, which enables combining data coming from different sources and in various formats, capturing, storing, manipulating, analysing, and displaying spatially referenced data. GIS has grown as a field, at first expanding in local and regional governmental sectors (Greene and Pick 2006). Today, GIS has been applied in many different areas such as transportation, landscape changes analysis, emergency management, city and regional planning, to mention only a few.
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