抄録
A preliminary study has been conducted to test the effectiveness of the canonical discriminant approach to making spatial discrimination of salt-affected soil surfaces, using the Landsat TM data taken in the middle reaches of the Heihe River, China. A saline area can be considered a mixture of salt-affected patches which differ in degree, and hence we tried to make discrimination of salt-affected soil surfaces by canonical discriminant approach. Three 360×360 m test plots with different land surface conditions, "Bare-soil surface area (strongly saline), "Reed area (moderately saline), "Barley field (weakly saline)", were selected as training areas or groups. Five indices, B4 (band 4 DN), Wetness, SI, NDSI, and Fe2O3, (composite indices), were determined as discriminating variables, and two canonical discriminant functions, y 1, and y2, were obtained for the three groups using these five cUscriminating variables. When group centroids and individual cases were plotted on the plane made by two canonical discriminant functions, y 1, and y2, the groups of cases were quite distinct and their centroids were well separated, which suggest that the canonical discriminant approach is promising for spatial discrimination of salt-affected soil surfaces.
| 元の言語 | 英語 |
|---|---|
| ページ（範囲） | 461-465 |
| ページ数 | 5 |
| ジャーナル | Journal of the Faculty of Agriculture, Kyushu University |
| 巻 | 57 |
| 発行部数 | 2 |
| 出版物ステータス | 出版済み - 9 1 2012 |
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All Science Journal Classification (ASJC) codes
- Biotechnology
- Agronomy and Crop Science
これを引用
Spatial discrimination of salt-affected soil surfaces using landsat TM data - A preliminary study in the middle reaches of the Heihe river, China. / Wu, Yueru; Wang, Weizhen; Morp, Makito; Yasutake, Daisuke; Cho, Hiroyuki; Kobayashi, Tetsuo; Masaharu, Kitano.
：: Journal of the Faculty of Agriculture, Kyushu University, 巻 57, 番号 2, 01.09.2012, p. 461-465.研究成果: ジャーナルへの寄稿 › 記事
}
TY - JOUR
T1 - Spatial discrimination of salt-affected soil surfaces using landsat TM data - A preliminary study in the middle reaches of the Heihe river, China
AU - Wu, Yueru
AU - Wang, Weizhen
AU - Morp, Makito
AU - Yasutake, Daisuke
AU - Cho, Hiroyuki
AU - Kobayashi, Tetsuo
AU - Masaharu, Kitano
PY - 2012/9/1
Y1 - 2012/9/1
N2 - A preliminary study has been conducted to test the effectiveness of the canonical discriminant approach to making spatial discrimination of salt-affected soil surfaces, using the Landsat TM data taken in the middle reaches of the Heihe River, China. A saline area can be considered a mixture of salt-affected patches which differ in degree, and hence we tried to make discrimination of salt-affected soil surfaces by canonical discriminant approach. Three 360×360 m test plots with different land surface conditions, "Bare-soil surface area (strongly saline), "Reed area (moderately saline), "Barley field (weakly saline)", were selected as training areas or groups. Five indices, B4 (band 4 DN), Wetness, SI, NDSI, and Fe2O3, (composite indices), were determined as discriminating variables, and two canonical discriminant functions, y 1, and y2, were obtained for the three groups using these five cUscriminating variables. When group centroids and individual cases were plotted on the plane made by two canonical discriminant functions, y 1, and y2, the groups of cases were quite distinct and their centroids were well separated, which suggest that the canonical discriminant approach is promising for spatial discrimination of salt-affected soil surfaces.
AB - A preliminary study has been conducted to test the effectiveness of the canonical discriminant approach to making spatial discrimination of salt-affected soil surfaces, using the Landsat TM data taken in the middle reaches of the Heihe River, China. A saline area can be considered a mixture of salt-affected patches which differ in degree, and hence we tried to make discrimination of salt-affected soil surfaces by canonical discriminant approach. Three 360×360 m test plots with different land surface conditions, "Bare-soil surface area (strongly saline), "Reed area (moderately saline), "Barley field (weakly saline)", were selected as training areas or groups. Five indices, B4 (band 4 DN), Wetness, SI, NDSI, and Fe2O3, (composite indices), were determined as discriminating variables, and two canonical discriminant functions, y 1, and y2, were obtained for the three groups using these five cUscriminating variables. When group centroids and individual cases were plotted on the plane made by two canonical discriminant functions, y 1, and y2, the groups of cases were quite distinct and their centroids were well separated, which suggest that the canonical discriminant approach is promising for spatial discrimination of salt-affected soil surfaces.
UR - http://www.scopus.com/inward/record.url?scp=84866720079&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84866720079&partnerID=8YFLogxK
M3 - Article
VL - 57
SP - 461
EP - 465
JO - Journal of the Faculty of Agriculture, Kyushu University
JF - Journal of the Faculty of Agriculture, Kyushu University
SN - 0023-6152
IS - 2
ER -