[Application of a numeric cartographical method in hilly areas for the creation of homogeneous areas of biotopes]

agentes nocivos animal population biogeographic regions biotope biotopes biotopi cartografia cartographie cartography copertura vegetale del suolo cubierta vegetal environmental factors facteur du milieu facteur nuisible factores ambientales fattori ambientali fattori nocivi fauna faune highlands injurious factors methode methods metodi plant cover popolazione animale population animale regioni biogeografiche reglamentaciones regulations