What is GIS?

a global intelligence service that operates Earth-orbiting satellites for surveillance
a computer hardware and software system that analyzes, displays, and stores geographic data
a network of Earth-orbiting satellites that connect to receivers to calculate precise time and location information
the use of aerial photography or satellite imagery to collect data on the surface of Earth from a distance

GIS stands for Geographic Information System, which is a computer hardware and software system that analyzes, displays, and stores geographic data. It is used to capture, manage, analyze, and present spatial or geographical data. GIS combines layers of information about a particular location to give a better understanding of that location and enable more informed decision-making. It can be used in various fields, such as urban planning, environmental management, transportation, and emergency response.