PROBLEM POINTS OF DETERMINING THE METRIC CHARACTERISTICS OF WOOD STANDS DURING DECODERING

The relevance of the content of topographic maps of various scales for a long time remained catastrophic and did not correspond to the state of the area throughout the territory of Ukraine. The display of vegetation elements is an integral part of the content of a topographic map of any area. The recently announced "Green Country" project, the initiatives of the Ministry of Environmental Protection and Natural Resources of Ukraine regarding the state forest management strategy until 2035 aimed at increasing the share of forested areas throughout the country, and even achieved certain positive results in the northwestern and western regions countries. Currently, significant catastrophic changes (mechanical damage, forest fires) are taking place in the forest stands in the places of hostilities in the south and east of Ukraine.  The majority of topographic maps are created and updated by means of photo-topographic surveying and subsequent deciphering of the obtained materials. Quantitative characteristics of tree plantation objects are determined by cartometric measurements and correlation ratios. Forest vegetation conditions for the same tree stands may differ, and as a result, the height of the same tree species depending on the growth conditions, which directly affects the determination of the bonity class, may vary several times. The diameter of trees at breast height (1.3 m) is determined through the correlation between the average height of the tree, its age and the thickness of its trunk. The main requirements for the representation of vegetation cover on topographic maps relate to the correct and visual display of types of vegetation cover, their boundaries, quantitative and qualitative characteristics. The authors analyzed the main types of woody vegetation, the age-related changes in their height depending on the bonity classes, established a correlation between the age, average height and average thickness of the trunks of woody plants, and also interpolated through convenient ranges the average values of the diameters of the trunks. Such clarifications will increase the reliability of the displayed information, in particular in the aspect of quantitative information on tree stands.