This research was designed to examine data gathering and analyzing process for classifying and interpreting a specifîc forest based on ecological units. About 132 sample plots were systematically established with 216 x 216 m intervals in the study area of 645 ha within the faculty research forest of Karadeniz Technical University, Ormanüstü Planning Unit of Maçka Forest Enterprise, Trabzon. Site classification is conducted by combining climate, physiographic and vegetation classification procedures using spatial analysis functions of Geographic Information Systems (GIS). Since there vvas no vvater shortage in this study area and the research site vvas relatively small, it vvas easily classified into a humid or moist temperate climate zone. Forest site classification vvas demonstrated successfully for the first time in Turkish forestry using GIS. The technology allovved us to store, analyze and demonstrate the tedious and costly procedures of forest site classification. This automated process provides more accurate, fast accessible, sound, up-to-date and more efficient data base for use in forestry at large and especially in forest management planning.