A geographic information system (GIS) can be defined, very simply, as a computerized mapping system linked to a large “database” of various kinds of land and property information. At the touch of a few buttons, a GIS can graphically display requested information (on maps), and it can also sort and tabulate large quantities of data in number or text form. A GIS has applications in geography, landscape architecture, transportation, environmental science and urban planning, or any subject that can be related to land. This is because attributes about features such as soil types, land contours, aquifers or land uses can be represented graphically on a map and described as part of a database. At the Planning Commission, GIS is used to track land information, including land use and zoning. Simple queries can be made to the GIS, such as, “What are the addresses of the churches in Planning District 8?”
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