Arborist tree inventory is an important part of urban forestry, which allows us to maintain the vitality of trees that are safe for the environment. In the municipality of Radovljica, we inventoried a total of 161 trees at six selected locations using the visual method from the ground and the visual method from the air using a drone. Using both methods, we determined the height, trunk diameter, crown symmetry, visual assessment of the crown, vitality, reinforcement, root condition, social status, and type and cause of damage. The greatest difference between the methods was found in the assessment of crown shape, where the visual method from air proved to be more advantageous. Visual assessment from above proved to be a good complement to visual assessment from the ground in assessing the crown and its symmetry, and in assessing the nature of damage to the branches and top. The use of both methods of tree assessment could become a permanent practice in the future, which would allow a better overall assessment of the condition of the trees and better decision making regarding further actions.
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