A Model for Estimating Total Forest Coverage with Ground-Based Digital Photography

Zhu Jun GU, Zhi Yuan ZENG, Xue Zheng SHI, Lin LI, D. C. WEINDORF, Yong ZHA, Dong Sheng YU, Yong Mei LIU

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

Vegetation fractional coverage (VFC) is one of the key indicators of vegetation distribution. In the work a measurement-based model was developed to derive total forest VFC (TG) as well as the VFC of trees (T) and shrub-grasses (G) separately in a subtropical forest area in Nanjing, China. Both upward and downward photographs were taken with a digital camera in 72 quadrats (10 m × 10 m each). Fifteen models were established and validated. Models jointly using both T and G performed better than those using the T and G separately. The best model, TG = T + G - 1.134 × T × G - 0.025 (R2 =0.9115, P < 0.01, root mean squared error = 0.0789), is recommended for application. This model provides a good way to obtain total forest VFC values through taking tree and shrub-grass photos on ground below tree canopy rather than above tree canopy.

Original languageEnglish
Pages (from-to)318-325
Number of pages8
JournalPedosphere
Volume20
Issue number3
DOIs
StatePublished - Jun 2010

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Keywords

  • 2-layer photography
  • digital camera
  • shrub-grasses
  • trees

Cite this

GU, Z. J., ZENG, Z. Y., SHI, X. Z., LI, L., WEINDORF, D. C., ZHA, Y., YU, D. S., & LIU, Y. M. (2010). A Model for Estimating Total Forest Coverage with Ground-Based Digital Photography. Pedosphere, 20(3), 318-325. https://doi.org/10.1016/S1002-0160(10)60020-3