Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2021, Vol. 37 ›› Issue (16): 108-118.doi: 10.11924/j.issn.1000-6850.casb2020-0432

Special Issue: 资源与环境

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Estimation of Crop Planting Area and Spatial Distribution Based on MODIS NDVI Time-series Data of Rice and Dry Farmland Crops

Jiang Lanqi1,2(), Wang Ping1,2, Jiang Lixia1,2, Gong Lijuan1,2, Yu Chenglong1,2, Li Xiufen1,2()   

  1. 1Heilongjiang Province Institute of Meteorological Sciences, Harbin 150030
    2Innovation and Opening Laboratory of Regional Eco-Meteorology in Northeast, China Meteorological Administration, Harbin 150030
  • Received:2020-09-07 Revised:2020-10-10 Online:2021-06-05 Published:2021-06-16
  • Contact: Li Xiufen E-mail:jianglanqi@126.com;ge-2003@163.com

Abstract:

Aiming at the current situation and demand of paddy and dry farmland planting area survey in agriculture information service, we took Heilongjiang Province as the study area, by analyzing the characteristics of crop growing stage and the timer-series of vegetation index (NDVI, EVI and LSWI), we introduced accumulative temperature condition, then the spatial distribution was studied on cropland and others, and paddy rice and dry farmland crops. The classification results were verified with field investigation on verification points. The results showed that a high mapping accuracy of the classification was obtained, the overall accuracy reached 90.68%, the Kappa coefficient was 0.81. The mapping accuracy of rice planting area was 81.13% and the user accuracy was 97.73%, and that of dry farmland crops was 98.46% and 87.07%, respectively. Compared with the classification results without accumulative temperature, the overall accuracy was increased by 12.77%. The mapping accuracy of rice and dry farmland crop was increased by 22.57% and 5.94%, respectively. The finding of this study could improve the classification precision though introducing the accumulative temperature, and this method is featured with high automatic degree and stable classification results.

Key words: paddy rice, dry farmland crop, planting area, vegetation index, MODIS

CLC Number: