GIS stands for Geographic Information System and it is a tool that archaeologists use to map out ancient settlements and sites. Archaeologists use this tool to explore the geography of an area, identify potential sites, and study the environment in which the sites are located. GIS allows archaeologists to look at different maps and aerial photographs to find out the size and shape of sites, and the surrounding landscape. GIS can also be used to analyze soil and vegetation types and to identify important landscape features. GIS helps archaeologists understand the history of an area, learn more about its people and cultures, and better understand the environment within which they lived. GIS is an important part of archaeological research and helps archaeologists to better understand the past.