The large-scale monitoring of biota is based on mapping, investigation and evaluation of the landscape structure. In biotope mapping we distinguish 4 levels of spatial identification of the biotopes from the viewpoint of their content: preliminary mapping (there are marked the parts forming basic building stones of conservation and development of biodiversity), preparatory and survey mapping (systematical mapping of whole regions on unique information basis) and special mapping (it defines the character of biotopes in the database of the survey mapping more precisely and it completes the area by other biotopes interesting from scientific viewpoint).