This article highlights the emergence of new forms of information systems, as well as the concepts of "data", "information" and "knowledge", which provide a scientific approach to the development and widespread use of GIS. In addition, the article presents the knowledge necessary to use GIS navigation tools and shows the use of information systems as an effective means of acquiring knowledge. The relationship between the concepts of "information", "data" and "decisions" arising in the decision-making process is widely covered.