Item type |
紀要論文(ELS) / Departmental Bulletin Paper(1) |
公開日 |
1994-01-01 |
タイトル |
|
|
タイトル |
VEGETATION CHANGE DETECTION USING LANDSAT DATA IN NORTHERN FINLAND : A TEST CASE USING SMOOTHING AND LAPLACIAN FILTERING (15th Symposium on Polar Biology) |
言語 |
|
|
言語 |
eng |
資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
departmental bulletin paper |
ID登録 |
|
|
ID登録 |
10.15094/00005235 |
|
ID登録タイプ |
JaLC |
ページ属性 |
|
|
内容記述タイプ |
Other |
|
内容記述 |
P(論文) |
記事種別(英) |
|
|
|
en |
|
|
Proceeding |
論文名よみ |
|
|
その他のタイトル |
VEGETATION CHANGE DETECTION USING LANDSAT DATA IN NORTHERN FINLAND : A TEST CASE USING SMOOTHING AND LAPLACIAN FILTERING (15th Symposium on Polar Biology) |
著者名よみ |
アワヤ, ヨシオ
/ タナカ, ノブヒコ
|
著者名(英) |
AWAYA, Yoshio
HAME, Tuomas
TANAKA, Nobuhiko
|
著者所属(英) |
|
|
|
en |
|
|
Forestry and Forest Products Research Institute |
著者所属(英) |
|
|
|
en |
|
|
Technical Research Center of Finland |
著者所属(英) |
|
|
|
en |
|
|
Forestry and Forest Products Research Institute |
抄録(英) |
|
|
内容記述タイプ |
Other |
|
内容記述 |
It has been predicted that some boreal tree species would migrate north several hundred meters annually in response to the predicted global warming due to doubling of CO_2 by the middle of the next century. It has also been said that large parts of the boreal forest and tundra would migrate and disappear because of global warming. The average global temperature has already shown a tendency to increase over the past two decades. In the meantime, twenty years have passed since the launching of Landsat 1 and satellite data have been taken since then. The data make it possible to monitor vegetation over a long time. This paper describes the basic concepts to monitor vegetation shifts using satellite data and a system of detection. The system, consisting of a linear-weighting running-average smoothing and a Laplacian filter, was tested using Landsat Multispectral Scanner data for northern Finland. Vegetation boundaries were defined as zero isopleths of the second derivative of a Laplacian-filtered normalized difference vegetation index image. A comparison of boundary lines derived from 1972 and 1987 Landsat data showed small changes in the vegetation boundary, but no clear evidence of vegetation shifts was found. |
雑誌書誌ID |
|
|
収録物識別子タイプ |
NCID |
|
収録物識別子 |
AA10819561 |
書誌情報 |
Proceedings of the NIPR Symposium on Polar Biology
巻 7,
p. 270-282,
発行日 1994-01
|
出版者 |
|
|
出版者 |
National Institute of Polar Research |