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dc.creatorWu, Weichengen_US
dc.date2014-01-28en_US
dc.date.accessioned2017-07-24T00:53:54Z
dc.date.available2017-07-24T00:53:54Z
dc.identifierhttp://www.mdpi.com/2072-4292/6/2/1211en_US
dc.identifierhttps://mel.cgiar.org/reporting/download/hash/V8y4OzGJen_US
dc.identifier.citationWeicheng Wu. (28/1/2014). The Generalized Difference Vegetation Index (GDVI) for Dryland Characterization. Remote Sensing, 6 (2), pp. 1211-1233.en_US
dc.identifier.urihttps://hdl.handle.net/20.500.11766/7287
dc.description.abstractA large number of vegetation indices have been developed and widely applied in terrestrial ecosystem research in the recent decades. However, a certain limitation was observed while applying these indices in research in dry areas due to their low sensitivity to low vegetation cover. In this context, the objectives of this study are to develop a new vegetation index, namely, the Generalized Difference Vegetation Index (GDVI), and to examine its applicability to the assessment of dryland environment. Based on the field investigation and crop Leaf Area Index (LAI) measurement, five spring and summer Landsat TM and ETM+ images in the frame with Path/Row number of 174/35, and MODIS (Moderate Resolution Imaging Spectroradiometer) LAI and vegetation indices (VIs) data (MOD15A2 and MOD13Q1), of the same acquisition dates as the Landsat images, were acquired and employed in this study. The results reveal that, despite the same level of correlation with the fractional vegetation cover (FVC) as other VIs, GDVI shows a better correlation with LAI and has higher sensitivity and dynamic range in the low vegetal land cover than other vegetation indices, e.g., the range of GDVI is higher than Normalized Difference Vegetation Index (NDVI),Soil-Adjusted Vegetation Index (SAVI), Enhanced Vegetation Index (EVI), Wide Dynamic Range Vegetation Index (WDRVI), and Soil-Adjusted and Atmospherically Resistant Vegetation Index (SARVI), by 164%–326% in woodland, 185%–720% in olive plantation, and 190%–867% in rangeland. It is, hence, concluded that GDVI is relevant for, and has great potential in, land characterization, as well as land degradation/desertification assessment in dryland environment.en_US
dc.formatPDFen_US
dc.languageenen_US
dc.publisherMDPIen_US
dc.rightsCC-BY-4.0en_US
dc.sourceRemote Sensing;6,(2014) Pagination 1211,1233en_US
dc.subjectgdvien_US
dc.subjectsensitivityen_US
dc.subjectdynamic rangeen_US
dc.subjectland characterizationen_US
dc.subjectdryland environmenten_US
dc.subjectvegetation indicesen_US
dc.titleThe Generalized Difference Vegetation Index (GDVI) for Dryland Characterizationen_US
dc.typeJournal Articleen_US
cg.subject.agrovoclaien_US
cg.contributor.centerInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.contributor.crpCGIAR Research Program on Dryland Systems - DSen_US
cg.contributor.funderInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.contributor.projectCommunication and Documentation Information Services (CODIS)en_US
cg.contributor.project-lead-instituteInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.coverage.regionWestern Asiaen_US
cg.coverage.countrySYen_US
cg.contactw.wu@cgiar.orgen_US
cg.identifier.doihttps://dx.doi.org/10.3390/rs6021211en_US
dc.identifier.statusOpen accessen_US
mel.impact-factor3.406en_US


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