A geographic information system (GIS) is the science of geography that helps to gather, manage, store, manipulate and analyze all kinds of spatial or geographical data. As an emerging technology, GIS is constantly evolving with the launch of new technologies, tools, Internet and mobile devices. The five key components that form GIS include hardware, software, data, people and methods. GIS operates on a hardware which can be a centralized computer server or desktop computers used in stand-alone. Eratost technologies provides High Quality GIS Services in Delhi.