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Estimating stand structure using digitalized aerial photography

Abstract

This study estimates the structure of a forest stand using high-resolution data from digitized aerial photography. The study area was conducted on the fifteen plots with the size of 20 m × 20 m or 15 m × 15 m taken as samples of sugi (Cryptomeria japonica D. Don) stands. The stand factor was investigated based on its relation with the digitalized number (DN) on the black and white aerial ortho photos (scale 1:5,000, taken in 1995). We analyzed various stand structure factors and the distribution of DN from the image data using the Weibull function, which comforms well to every shape of distributions. Using the Weibull distribution, a significant negative correlation was observed between the quantity of stand factors (Mean DBH and the stand volume) and the distribution parameterc of DN. A significant positive correlation was also observed between the distribution parameterc of the stand factor (DBH, height and volume) and the distribution parameterc of DN.

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Correspondence to Hisaaki Kamioka.

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Kamioka, H., Abe, N. Estimating stand structure using digitalized aerial photography. J For Res 4, 75–78 (1999). https://doi.org/10.1007/BF02762229

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Key words

  • aerial photography
  • DN distribution
  • parameterc
  • stand factor
  • Weibull distribution