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The aim of this study was to evaluate the automatically determined parameters of tree crowns, which are then used in two-phaseinventory method of growing stock. Research was performed in forest stands of different age, located in the Stolowe MountainsNational Park (south-western Poland) where the dominant species was Norway spruce (<i>Picea abies</i> L.). On the test areaof approximately 500 hectares, 35 sample plots were measured. On LIDAR-based Crow Height Model (CHM), in the placescorresponding to the position of 500 m<sup>2</sup> circular ground samples, automatic segmentation was carried out. The extent of the crownwas associated with the height of the tree. Two variants of the assigning separate crowns in the sample were used: (1) according tothe centroid position, (2) according to the location of any fragment of the crown inside the sample plot boundary. In each of thevariants five series of measurements with different relative height of the range 0.65–0.8 (with a gap of 0.05) were carried out.Relationship between the volume of living trees measured on the ground and LIDAR parameters (average height of trees and treecanopy projection area) automatically measured based on CHM was determined. Multiple correlation coefficient differed dependingon the location to extract coverage crowns and ranged from 0.687 to 0.788. The variant of counting of all trees with crowns or piecesinside the sample appeared to perform better. The relationship between the above-indicated characteristics was stronger afterelimination of dead trees (about 0.1 for each of cases). This means that for measurements of the growing stock in forests underprotection, it is necessary to improve the process of automatic segmentation of the crown, by identification and elimination of deadtrees – usually present at sample plot

the international archives of the photogrammetry, remote sensing and spatial information sciences/international archives of the photogrammetry, remote sensing and spatial information sciences

CROWN DELINEATION INFLUENCE ON STANDING VOLUME CALCULATIONS IN PROTECTED AREA