Final Answer:
A Geographic Information System (GIS) uses maps entered into a computer as a base, and the master map can then be overlaid with other information.
Step-by-step explanation:
A Geographic Information System (GIS) is a technology that captures, analyzes, and displays spatial or geographical data. It utilizes maps as a foundational element, which are entered into a computer system.
These maps serve as a base, and a master map is created, forming the primary reference point. The power of GIS lies in its ability to overlay this master map with various layers of additional information, such as demographic data, land use, environmental factors, or infrastructure details.
This overlaying process allows for the analysis of relationships and patterns between different sets of data, providing valuable insights for decision-making in fields ranging from urban planning to environmental management.