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Proceedings Paper

Mapping soil total nitrogen of cultivated land at county scale by using hyperspectral image
Author(s): Xiaohe Gu; Li Yan Zhang; Meiyan Shu; Guijun Yang
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Paper Abstract

Monitoring total nitrogen content (TNC) in the soil of cultivated land quantitively and mastering its spatial distribution are helpful for crop growing, soil fertility adjustment and sustainable development of agriculture. The study aimed to develop a universal method to map total nitrogen content in soil of cultivated land by HSI image at county scale. Several mathematical transformations were used to improve the expression ability of HSI image. The correlations between soil TNC and the reflectivity and its mathematical transformations were analyzed. Then the susceptible bands and its transformations were screened to develop the optimizing model of map soil TNC in the Anping County based on the method of multiple linear regression. Results showed that the bands of 14th, 16th, 19th, 37th and 60th with different mathematical transformations were screened as susceptible bands. Differential transformation was helpful for reducing the noise interference to the diagnosis ability of the target spectrum. The determination coefficient of the first order differential of logarithmic transformation was biggest (0.505), while the RMSE was lowest. The study confirmed the first order differential of logarithm transformation as the optimal inversion model for soil TNC, which was used to map soil TNC of cultivated land in the study area.

Paper Details

Date Published: 19 February 2018
PDF: 7 pages
Proc. SPIE 10607, MIPPR 2017: Multispectral Image Acquisition, Processing, and Analysis, 106070J (19 February 2018); doi: 10.1117/12.2283065
Show Author Affiliations
Xiaohe Gu, Beijing Research Ctr. for Information Technology in Agriculture (China)
Li Yan Zhang, Beijing Research Ctr. for Information Technology in Agriculture (China)
Meiyan Shu, Beijing Research Ctr. for Information Technology in Agriculture (China)
Guijun Yang, Beijing Research Ctr. for Information Technology in Agriculture (China)


Published in SPIE Proceedings Vol. 10607:
MIPPR 2017: Multispectral Image Acquisition, Processing, and Analysis
Xinyu Zhang; Jun Zhang; Hongshi Sang, Editor(s)

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