Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1080/10106049.2019.1669724 |
Examining the prospects of sentinel-2 multispectral data in detecting and mapping maize streak virus severity in smallholder Ofcolaco farms, South Africa | |
Dhau, Inos1; Dube, Timothy2; Mushore, Terence Darlington3 | |
通讯作者 | Dhau, Inos |
来源期刊 | GEOCARTO INTERNATIONAL
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ISSN | 1010-6049 |
EISSN | 1752-0762 |
出版年 | 2019 |
英文摘要 | Crop diseases monitoring is critical in understanding the effects of diseases on crop production and associated implications on food security. The aim of this study was to assess the utility of the 10?m resolution Sentinel 2 data set, in detecting and mapping Maize Streak Virus (MSV) disease in Ofcolaco farms in Tzaneen, South Africa. Specifically, the study sought to spectrally discriminate and map maize infected with MSV from other land-cover classes. To achieve this objective two analysis approaches were used: spectral analysis (Test I: spectral bands; Test II: spectral bands?+?spectral vegetation indices) using random forest algorithm in a supervised classification approach. The indices combined with spectral bands were EVI, SAVI, NDVI, GNDVI, GLI and MSAVI. Results indicated that infected maize was highly separable from health maize and other land cover classes (TDSI > 1.8). The mapping accuracy was high using spectral data (Overall accuracy = 85.29% and Kappa = 0.79) and even higher when spectral bands were combined with derived vegetation indices (Overall accuracy = 89.43% and Kappa = 0.84). The results of the study show that the 10?m resolution multispectral Sentinel 2 data set can be used to detect and map maize infected by MSV. The findings are important in showing the value of combining 10?m spectral data with derived indices from Sentinel 2 in improving monitoring of maize steak virus in resource-constrained nations. |
英文关键词 | Maize disease mapping food security satellite applications costs semi-arid regions |
类型 | Article ; Early Access |
语种 | 英语 |
国家 | South Africa ; Zimbabwe |
收录类别 | SCI-E |
WOS记录号 | WOS:000488356700001 |
WOS关键词 | LEAF-AREA INDEX ; VEGETATION INDEXES ; RANDOM FOREST ; CLASSIFICATION ; YIELD ; DISEASE ; RESISTANCE ; TIME ; BAND |
WOS类目 | Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology |
WOS研究方向 | Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/215899 |
作者单位 | 1.Univ Limpopo, Dept Geog & Environm Studies, Sovenga, South Africa; 2.Univ Western Cape, Dept Earth Sci, Inst Water Studies, Bellville, South Africa; 3.Univ Zimbabwe, Fac Sci, Phys Dept, Harare, Zimbabwe |
推荐引用方式 GB/T 7714 | Dhau, Inos,Dube, Timothy,Mushore, Terence Darlington. Examining the prospects of sentinel-2 multispectral data in detecting and mapping maize streak virus severity in smallholder Ofcolaco farms, South Africa[J],2019. |
APA | Dhau, Inos,Dube, Timothy,&Mushore, Terence Darlington.(2019).Examining the prospects of sentinel-2 multispectral data in detecting and mapping maize streak virus severity in smallholder Ofcolaco farms, South Africa.GEOCARTO INTERNATIONAL. |
MLA | Dhau, Inos,et al."Examining the prospects of sentinel-2 multispectral data in detecting and mapping maize streak virus severity in smallholder Ofcolaco farms, South Africa".GEOCARTO INTERNATIONAL (2019). |
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