What are transformation Rules in Data Mapping.?

Can be defined geographic information systems Geographic Information Systems GIS as a way depends mainly on the use of computers in: assembling, processing, and display and analyze the data, associated with geographic locations, to infer information of great importance, to take the appropriate decisions. These systems are used by qualified individuals, resolve to deal with the data and information in the areas of different development problems. And it includes geographic information systems technologies: the usual operations of the database, such as Data Base: inquiry, and statistical analysis, in addition to visualization, analysis and geographic characteristic, provided maps.