Many species of trees grow on Earth that have long been known and classified by experts, but it is not always clear to the average layman which subspecies these or other trees belong to. But some may be in the Red Book and it is forbidden to cut them down. For example, the genus of spruce alone consists of about 40 varieties. To minimize the risk of cutting rare trees, the Finnish Natural Resources Institute has developed a laser scanning method that recognizes the tree under study with 95% accuracy. The laser scanning system creates a detailed point profile of the tree and transfers it to the smartphone for further processing. Based on the information received, a special application creates a 3D model and classifies it according to its own database of tree species. Tree recognition is carried out according to 15 criteria, among which are: diameter and features of the trunk, number of branches and their angle. The technology has already been successfully tested on the most common tree species in Finland: pine, spruce and birch. Scientists plan to expand the database and system capabilities.