| Item type |
テクニカルレポート / Technical Report(1) |
| 公開日 |
2015-03-26 |
| タイトル |
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タイトル |
The use of ALOS data in studying environmental changes in Malaysia |
|
言語 |
en |
| 言語 |
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言語 |
eng |
| キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Water Quality |
| キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
TSS |
| キーワード |
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言語 |
en |
|
主題Scheme |
Other |
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主題 |
Land Cover |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_18gh |
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資源タイプ |
technical report |
| 著者 |
Lim, Hwee San
Jafri, Mohd. Zubir Mat
Abdullah, Khiruddin
Saleh, Nasirun Mohd.
Tahrin, Norhaslinda Mohamed
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| 著者所属（英） |
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en |
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School of Physics, Universiti Sains Malaysia |
| 著者所属（英） |
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en |
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School of Physics, Universiti Sains Malaysia |
| 著者所属（英） |
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en |
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School of Physics, Universiti Sains Malaysia |
| 著者所属（英） |
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en |
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School of Physics, Universiti Sains Malaysia |
| 著者所属（英） |
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en |
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School of Physics, Universiti Sains Malaysia |
| 出版者 |
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出版者 |
宇宙航空研究開発機構地球観測研究センター (JAXA)(EORC) |
| 出版者（英） |
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出版者 |
Earth Observation Research Center, Japan Aerospace Exploration Agency (JAXA)(EORC) |
| 書誌情報 |
宇宙航空研究開発機構特別資料
en : JAXA Special Publication: Final Reports of the ALOS Research Announcement Programs 1&2, 2011
巻 JAXA-SP-11-007E,
p. PI404-1-PI404-20,
発行日 2011
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| 抄録（英） |
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内容記述タイプ |
Other |
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内容記述 |
Remote sensing data have been widely used in environmental studies like land cover change, flood observation, environmental pollution monitoring. This study is dealing with obtaining land cover, flood observation and environmental pollution using ALOS data. With the availability of remotely sensed and in situ data sets the derivable geophysical parameters are water depth, sea surface temperature (SST) and sediment (suspended matter) concentration. Understanding of the optical properties of water and the atmospheric contribution serves as a basic for the derivation of algorithms for specific applications using data in the visible and the near infrared regions. For the thermal region atmospheric absorption and the surface thermal properties are considered for the development of the SST algorithm. Analyses of time series of remote sensing images with regard to the variation of the water quality parameters of interest are required. In situ water samples coincident with the remote sensing data will be collected. Measurements of the in situ water quality parameters are performed at selected locations within the studied area, i.e. water areas surrounding Penang Island. Surface and vertical profile of sediment concentrations will be measured. This will be done at various locations along the coastal and during diurnal various times of the year. The time scheme for the data collection will be covering different seasons of the year. Satellite scenes that coincide simultaneously with the in situ data will be employed. |
| 抄録（英） |
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内容記述タイプ |
Other |
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内容記述 |
Several processing steps will be performed to the remote sensing data for water quality maps generation: |
| 抄録（英） |
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内容記述タイプ |
Other |
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内容記述 |
1. Geometric correction - images will be rectified to the corresponding maps or coordinate system of the area. |
| 抄録（英） |
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内容記述タイプ |
Other |
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内容記述 |
2. Atmospheric correction - the darkest pixel method will be applied to reduce atmospheric contamination on the scenes. Other methods will also be investigated. Cloud masking will be |
| 抄録（英） |
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内容記述タイプ |
Other |
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内容記述 |
performed to the thermal data. |
| 抄録（英） |
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内容記述タイプ |
Other |
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内容記述 |
3. Algorithm calibration, regression analysis - regression analysis will be performed to determine the optimum algorithm for each application. |
| 抄録（英） |
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内容記述タイプ |
Other |
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内容記述 |
4. Generation of water quality maps - the calibrated algorithm will be applied to the remote sensing data sets for establishing water quality maps. |
| 抄録（英） |
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内容記述タイプ |
Other |
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内容記述 |
5. Interpretation and modeling - from the retrieved information, detailed interpretation can be made. |
| 抄録（英） |
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内容記述タイプ |
Other |
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内容記述 |
Human-induced changes in land cover are as ancient as humankind itself. Society's demand for physical resources, and the expansion of its technological, managerial, and institutional capacity to produce, move, and consume such resources, have long altered land vegetation and other surface features. The characteristics of land cover have important impacts on climate, global biogeochemistry, and the abundance and composition of terrestrial species. The land cover will be mainly derived from visual interpretation of recent high resolution satellite images digitally enhanced. In this study, we propose to use high resolution satellite imagery to map areas of forest clearing and general land cover types for the entire Peninsular Malaysia region. In this study, the supervised and unsupervised classifications techniques will be used to generate thematic land cover maps. And then their accuracy will be determined by the Kappa Coefficient and overall accuracy. The thematic interpretation of ALOS data and the validation of the land cover map will be supported by available Landsat TM images, SPOT images and IRS data, and vegetation maps and field data collected in the region. The resulting land cover map will be integrated in a socio-economic study to assess the trends and patterns of deforestation by including demographic and social and environmental policies. Finally, we also will study the land cover changes over the study areas. There were two steps involved in identifying land cover changes using the ALOS imagery: 1) identify the land cover types on both of the ALOS images, and 2) compare the land cover types on the ALOS images to determine which areas represented land cover changes. In this study, we also will investigate the coincident distribution, and detailed patterns in space and time of land cover, land-cover attributes, and land-cover change. Several processing steps will be performed to the remote sensing data: |
| 抄録（英） |
|
|
内容記述タイプ |
Other |
|
内容記述 |
1. Geometric correction - images will be rectified to the corresponding maps or coordinate system of the area. |
| 抄録（英） |
|
|
内容記述タイプ |
Other |
|
内容記述 |
2. Atmospheric correction - the darkest pixel method will be applied to reduce atmospheric contamination on the scenes. Other methods will also be investigated. Cloud masking will be performed to the thermal data. |
| 抄録（英） |
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内容記述タイプ |
Other |
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内容記述 |
3. Classification analysis - two classification techniques analysis will be performed to determine the land cover types. |
| 抄録（英） |
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内容記述タイプ |
Other |
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内容記述 |
4. Accuracy assessments - Kappa Coefficient will be performed to determine the accuracy of the classified maps. |
| 抄録（英） |
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内容記述タイプ |
Other |
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内容記述 |
5. Generation of land covers maps - the best produced accuracy classifier will be used to generate land cover maps. |
| 抄録（英） |
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内容記述タイプ |
Other |
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内容記述 |
6. Land cover changes interpretation - from the generated land cover maps, detailed land cover changes can be made. |
| 抄録（英） |
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内容記述タイプ |
Other |
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内容記述 |
7. Interpretation and modeling - from the retrieved information, detailed interpretation can be made. |
| 内容記述 |
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内容記述タイプ |
Other |
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内容記述 |
形態: カラー図版あり |
| 内容記述 |
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内容記述タイプ |
Other |
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内容記述 |
形態: DVD-ROM1枚 |
| 内容記述（英） |
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内容記述タイプ |
Other |
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内容記述 |
Physical characteristics: Original contains color illustrations |
| 内容記述（英） |
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内容記述タイプ |
Other |
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内容記述 |
Note: One DVD-ROM |
| ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
1349-113X |
| 書誌レコードID |
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収録物識別子タイプ |
NCID |
|
収録物識別子 |
AA11984031 |
| 資料番号 |
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内容記述タイプ |
Other |
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内容記述 |
資料番号: AA0065135067 |
| レポート番号 |
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内容記述タイプ |
Other |
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内容記述 |
レポート番号: JAXA-SP-11-007E |
65135067.pdf (1.2 MB)
