[1]Division of Environmental Science and Ecological Engineering, Korea University, Seoul 136-713, Republic of Korea;
[2]GIS/RS Center for Environmental Resources, Korea University, Seoul 136-173, Republic of Korea;
[3]Division of Forest Ecology, Korea Forest Research Institute, Seoul 130-712, Republic of Korea;
[4]National Forestry Cooperative Federation, Daejeon 306-808, Republic of Korea;
[5]Division of Forest Economics & Management, Korea Forest Research Institute, Seoul 130-712, Republic of Korea;