Geographic Information Systems (GIS) is a technological field that incorporates geographical features with tabular data in order to map, analyze, and assess real-world problems. The key word to this technology is Geography - this means that some portion of the data is spatial, or is in some way referenced to locations on the earth. Usually coupled with the spatial data is tabular information, also known as attributes. Attribute data can be generally defined as additional information about each of the spatial features. An example of this would be road centerlines. The location, shape, and length of a road is the spatial data. Additional data such a name, ownership, width, surface type, and address range information would make up the attribute data. It is the partnership of these two data types that enables GIS to be such an effective problem-solving tool through spatial analysis.