| Planting information extraction of winter wheat based on remote sensing images at county level |
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| DOI：10.7606/j.issn.1000-7601.2018.05.28 |
| Key Words: winter wheat plant area remote sensing images NDVI threshold Wugong County |
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| Abstract: |
| Winter wheat is the major grain crop in Guanzhogn region. Based on Landsat 8 OLI image, growth area of winter wheat in Wugong County, Shaanxi Province in 2017 was extracted by NDVI threshold segmentation and decision tree classification.The growth area and distribution of winter wheat in each town were calculated and analyzed. The results showed that: (1) Wintering period combined with flowering period of oil rape was the optimal choice of winter wheat growth information extraction; (2) The precision of winter wheat planting area extracted from the OLI image by NDVI threshold segmentation and decision tree classification was more than 93%;(3) The winter wheat area of Wugong County was 21 181.97 hm2 in 2007. Winter wheat area in Changning and Zhenyuan was larger than other towns and occupied by 24% and 19% of the whole plant area respectively. The growth area and spatial distribution of winter wheat extracted from remote sensing images were reliable. |