IMHE OpenIR  > Journal of Mountain Science  > Journal of Mountain Science-2012  > Vol9 No.2
Topographic Correction-Based Retrieval of Leaf Area Index in Mountain Areas
CHEN Wei; CAO Chunxiang
Corresponding AuthorCAO Chunxiang
Source PublicationJournal of Mountain Science
AbstractLeaf Area Index (LAI) is a key parameter in vegetation analysis and management, especially for mountain areas. The accurate retrieval of LAI based on remote sensing data is very necessary. In a study at the Dayekou forest center in Heihe watershed of Gansu Province, we determined the LAI based on topographic corrections of a SPOT-5. The large variation in the mountain terrain required preprocessing of the SPOT-5 image, except when orthorectification, radiation calibration and atmospheric correction were used. These required acquisition of surface reflectance and several vegetation indexes and linkage to field measured LAI values. Statistical regression models were used to link LAI and vegetation indexes. The quadratic polynomial model between LAI and SAVI (L=0.35) was determined as the optimal model considering the R and R2 value. A second group of LAI data were reserved to validate the retrieval result. The model was applied to create a distribution map of LAI in the area. Comparison with an uncorrected SPOT-5 image showed that topographic correction is necessary for determination of LAI in mountain areas.
KeywordSpot-5 Image Vegetation Index Leaf Area Index Topographic Correction Mountain Areas
Indexed BySCI
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Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
CollectionJournal of Mountain Science_Journal of Mountain Science-2012_Vol9 No.2
Corresponding AuthorCAO Chunxiang
Recommended Citation
GB/T 7714
CHEN Wei,CAO Chunxiang. Topographic Correction-Based Retrieval of Leaf Area Index in Mountain Areas[J]. Journal of Mountain Science,2012,9(2):166-174.
APA CHEN Wei,&CAO Chunxiang.(2012).Topographic Correction-Based Retrieval of Leaf Area Index in Mountain Areas.Journal of Mountain Science,9(2),166-174.
MLA CHEN Wei,et al."Topographic Correction-Based Retrieval of Leaf Area Index in Mountain Areas".Journal of Mountain Science 9.2(2012):166-174.
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