To answer such questions, GIS technology uses a process called buffering to determine the proximity relationship between features. The integration of different data layers involves a process called overlay. At its simplest, this could be a visual operation, but analytical operations require one or more data layers to be joined physically. This overlay, or spatial join, can integrate data on soils, slope, and vegetation, or land ownership with tax assessment. Visualization For many types of geographic operation the end result is best visualized as a map or graph.
Maps are very efficient at storing and communicating geographic information.
While cartographers have created maps for millennia, GIS provides new and exciting tools to extend the art and science of cartography. Map displays can be integrated with reports, three-dimensional views, photographic images, and other output such as multimedia. This Homepage was prepared by John McDowell, Polk County Coordinator. The information contained in this Homepage is considered public domain and the Office of Emergency Management encourages interested persons to utilize any portions of it that might be of educational benefit or enhance their local programs.