Fig. 1From: Using airborne laser scanning data for detecting canopy gaps and their understory type in mature boreal forestMap of the northern part of Koli National Park in eastern Finland, with locations of the study sites assigned to the natural forest and managed forests. Forest vegetation zones after Kalela (1970, in Kalliola 1973): South Finland (1 hemiboreal and 2 southern boreal), Pohjanmaa-Kainuu (3 middle boreal), and Peräpohjola and Metsä-Lappi (4 northern boreal)Back to article page