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ŠUMARSKI LIST 3-4/2017 str. 60     <-- 60 -->        PDF

The „Euclidean Distance” and „Path Distance” commands were used in order to calculate the extraction distances and the relative limit of the terrain condition. The Path Distance tool is one of the available tools in ArcGIS 10.0, as part of Spatial Analyst, performing cost distance analysis, accounted for both horizontal and vertical cost factors as well as true surface distance. Vertical factors determine the difficulty of moving from one cell to another, while accounting for the vertical elements that may affect the movement (Pellegrini, 2012; ESRI, 2013). The vertical factor parameters in the model were set as values of terrain slope according to the relative limits to determine the timber extraction system. The Path distance analysis was performed for each extraction system. Each output map was then reclassified according to the feasibility of each system. The five output maps were then unified to create the final map representing the extraction system. The graphical representation of workflow was given in Figure 2 to show our methods for combining all the information.
As mentioned above, topographic factors are very important for secondary forest roads. The research area generally has a steep topography. In figure 3 the Digital Terrain Model (DTM) of the study area is represented.
Given the mainly steep terrain slope classes 3, 4 and 5 (74.44%) predominated with the total area of 19269.74 ha, while the slope class 1 had the lowest cover according to the