UPORABNOST NACIONALNIH PODATKOV LASERSKEGA SKENIRANJA IN CIKLICNEGA AEROFOTOGRAFIRANJA PRI ZAZNAVANJU GOZDNIH VRZELI

Rezultati kažejo, da je ob odsotnosti podatkov LSS uporaba podatkov CAS za določanje vrzeli smiselna na velikopovršinski ravni in pri zaznavanju vrzeli, večjih od 100 m2 KLJUČNE BESEDE aznomerni in raznodobni gozdovi, digitalni model krošenj, gozdna vrzel, daljinsko zaznavanje, Lasersko skeniranje Slovenije, Ciklično aerofotografiranje Slovenije ABSTRACT The forest floor is covered with tree canopy, and the forest canopy gap is a larger or smaller area of the floor that is not covered by the canopy of the dominant tree layer. In the Pohorje area (Pahernik's forest estate), which is characterized by forests where trees of different diameters and ages occur in small areas, we analyzed the possibilities of automatic gap detection based on data from the Laser Scanning of Slovenia (LSS) and the Cyclic Aerial Survey of Slovenia (CAS). The detection of gaps with CAS data and LSS data is more comparable with a minimum gap area of 100 m²; the accuracy of detecting such gaps is 85.4 and 94.4% respectively. The results of the study show that in the absence of LSS data, the use of CAS data to detect forest canopy gaps on a large scale is useful when gaps with an area of more than 100 m² are detected KEY WORDS uneven-aged forests, canopy height model, forest canopy gap, remote sensing, Laser Scanning of Slovenia, Cyclic Aerial Survey of Slovenia 1 UVOD Gozdna tla zastirajo drevesne krošnje in gozdna vrzel je vsaka večja ali manjša površina tal, ki je ne prekrivajo krošnje zgornjega sloja dreves (Silva et al., 2019).