The real world. Views of the real world. Cognition of the real world. Informatics, geoinformatics, GIT and MGIT. History, nowadays and future of geoinformatics. Data, information, knowledge. Metadata, spatial data, geodata. Space, positioning. Time, timing. Feature, components of feature description. Geodata gathering. GIT: GIS, RS, GNSS, DMT, MGIT, geoweb, lidar. Safety of GIT and methods on how to ensure it. Applications of GIT in the sphere of security.