Journal of Applied Sciences ›› 2022, Vol. 40 ›› Issue (5): 809-819.doi: 10.3969/j.issn.0255-8297.2022.05.010

• Signal and Information Processing • Previous Articles     Next Articles

Inversion of Forest Canopy Height in Transmission Line Corridor Using ICESat-2 ATLAS & JL-1

LIN Haoyu1, WU Zhaocong1, SUN Xiaohu2   

  1. 1. School of Remote Sensing and Information Engineering, Wuhan University, Wuhan 430079, Hubei, China;
    2. State Grid Economic and Technology Research Institute Co., Ltd., Beijing 102209, China
  • Received:2021-06-11 Online:2022-09-30 Published:2022-09-30

Abstract: Aiming at the problem that ICESat-2 ATL08 product contains a lot of noise photons and gross errors of tree height, a method of photon filtering and gross errors elimination was designed by using a series of characteristics such as photon number, beam energy and ground coverage; The correlations of reflection parameters in each band with NDVI, RVI, SAVI, MSAVI, PVI vegetation indexes extracted from high-resolution multispectral data and with laser altimetry data were studied, and the effectiveness and accuracy of multiple regression and random forest model inversion were compared and analyzed. Study results showed that the random forest model can obtain higher inversion accuracy of tree height. The inversion experiment carried out in the transmission corridor of Lin' an District, Hangzhou City, Zhejiang Province obtained the result of RMSE=2.84 m. The tree height hidden danger map produced by combining the power data can provide auxiliary decision-making for the hidden danger investigation of transmission facilities.

Key words: ICESat-2, ATL08, JL-1, transmission corridor, forest canopy height

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