@article{oai:rakuno.repo.nii.ac.jp:00001773,
 author = {鈴木, 透 and 山根, 正伸 and 笹川, 裕史 and 金子, 正美},
 journal = {地理情報システム学会講演論文集},
 month = {Oct},
 note = {Article, Recently, beech forests in Tanzawa Mountains decline and/or wither because of compositive factors (aerial pollution, heavy infestations of Fagineura crenativora, and reduction of understory of beech forests et al.). However, the evaluation method of long-term changes of beech forest has not been established. In this study, we developed the method for evaluate the long-term changes of beech forests using multi-temporal aerial photographs and digital photogrammetry. We used the number of trees as an index for the decline of beech forests. In the results, we found that the number of trees is one of the effective index, but it is insufficient for evaluate the decline of beech forests. We concluded that it is necessary to develop the methods and the multiple indices for comprehensive evaluation of beech forest decline},
 pages = {573--576},
 title = {多時期の空中写真を用いたブナ林の長期的変化の評価手法に関する研究},
 volume = {18},
 year = {2009}
}