This diploma thesis was written with the goal to present the problem of determining the use of forest grounds in different sectors and problems in relation to space planning. In the first part of our work, we examined the normative and the professional basis for determining forest areas. We chose the plateau of Menina planina as a test area. Because there are many different factors, which influence the shaping of the forest areas, we analysed them as well as the restrictions, that are imposed onto this region. We also constructed a chronological overview of the transformation of these forest grounds from 1892 up until now. The main part of the diploma thesis is the comparison of the graphic layer »SESTOJ«, which is maintained by the Slovenia Forest Service, with the graphic layer »RABA«, which is maintained by the Ministry of Agriculture, Forestry and Food. They both present the forest areas in their own way. Through the comparison, we analysed the correspondence between the graphic layers. We analysed the results and sorted the deviations into classes accompanied with comments. Fieldwork was conducted, if there were greater deviations. In the conclusion, we analysed the main causes for the deviations of the forest grounds, suggested possible solutions for their reduction and presented the influence of these variations on space planning.