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.