Real world. Views of 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 how to ensure it. Applications of GIT in the spehere of security.