Faculty of Education, Nagasaki University, 1-14 Bunkyo, Nagasaki City, 852-8521,Japan;
College of Education, Chonnam National University, 300 Yongbong-Dong, Buk-Gu Kwangju City, 500-757 Korea;
Faculty of Education, Nagasaki University, 1-14 Bunkyo, Nagasaki City, 852-8521,Japan;
Faculty of Education, Nagasaki University, 1-14 Bunkyo, Nagasaki City, 852-8521,Japan;
Web GIS; digital video transport; Korea-Japan cable network;