ABSTRACT
Geographic information systems (GIS) facilitate the input, storage, manipulation, analysis, and visualization of geographic data. Geographic data generally has a location, size, shape, and various attributes, and may have a temporal component as well. Geographical analysis is important for a GIS. It includes combining different spatial themes, relating the dependency of phenomena to distance, interpolating, studying trends and patterns, and more. Without analysis, a GIS could be called a spatial database.
