Automated mapping of soybean and corn using phenology
文献类型：期刊论文
| 作者 | Zhong, Liheng1; Hu, Lina1; Yu, Le1; Gong, Peng1; Biging, Gregory S.1 |
| 刊名 | ISPRS Journal of Photogrammetry and Remote Sensing
 |
| 出版日期 | 2016 |
| 卷号 | 119页码:151-164 |
| 通讯作者 | Zhong, Liheng (lihengzhong@berkeley.edu) |
| 英文摘要 | For the two of the most important agricultural commodities, soybean and corn, remote sensing plays a substantial role in delivering timely information on the crop area for economic, environmental and policy studies. Traditional long-term mapping of soybean and corn is challenging as a result of the high cost of repeated training data collection, the inconsistency in image process and interpretation, and the difficulty of handling the inter-annual variability of weather and crop progress. In this study, we developed an automated approach to map soybean and corn in the state of Paraná, Brazil for crop years 2010-2015. The core of the approach is a decision tree classifier with rules manually built based on expert interaction for repeated use. The automated approach is advantageous for its capacity of multi-year mapping without the need to re-train or re-calibrate the classifier. Time series MODerate-resolution Imaging Spectroradiometer (MODIS) reflectance product (MCD43A4) were employed to derive vegetation phenology to identify soybean and corn based on crop calendar. To deal with the phenological similarity between soybean and corn, the surface reflectance of the shortwave infrared band scaled to a phenological stage was used to fully separate the two crops. Results suggested that the mapped areas of soybean and corn agreed with official statistics at the municipal level. The resultant map in the crop year 2012 was evaluated using an independent reference data set, and the overall accuracy and Kappa coefficient were 87.2% and 0.804 respectively. As a result of mixed pixel effect at the 500 m resolution, classification results were biased depending on topography. In the flat, broad and highly-cropped areas, uncultivated lands were likely to be identified as soybean or corn, causing over-estimation of cropland area. By contrast, scattered crop fields in mountainous regions with dense natural vegetation tend to be overlooked. For future mapping efforts, it has great potential to apply the automated mapping algorithm to other image series at various scales especially high-resolution images. © 2016 The Authors. |
| 收录类别 | EI |
| 语种 | 英语 |
| WOS记录号 | WOS:20162502504494 |
| 源URL | [http://ir.radi.ac.cn/handle/183411/39686]  |
| 专题 | 遥感与数字地球研究所_SCI/EI期刊论文_期刊论文 |
| 作者单位 | 1. Department of Environmental Sciences, Policy and Management, University of California, Berkeley 2.CA 3.94720, United States 4. Department of Sociology, Tsinghua University, Beijing 5.100084, China 6. Ministry of Education Key Laboratory for Earth System Modeling, Center for Earth System Science, Tsinghua University, Beijing 7.100084, China 8. State Key Laboratory of Remote Sensing Science, Jointly Sponsored by the Inst, Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal Univ., Beijing 9.100101, China |
| 推荐引用方式 GB/T 7714 | Zhong, Liheng,Hu, Lina,Yu, Le,et al. Automated mapping of soybean and corn using phenology[J]. ISPRS Journal of Photogrammetry and Remote Sensing,2016,119:151-164. |
| APA | Zhong, Liheng,Hu, Lina,Yu, Le,Gong, Peng,&Biging, Gregory S..(2016).Automated mapping of soybean and corn using phenology.ISPRS Journal of Photogrammetry and Remote Sensing,119,151-164. |
| MLA | Zhong, Liheng,et al."Automated mapping of soybean and corn using phenology".ISPRS Journal of Photogrammetry and Remote Sensing 119(2016):151-164. |
入库方式： OAI收割
来源：遥感与数字地球研究所
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