Applications of Multispectral Optical Satellite Imaging in Forestry

Published Date
Land Surface Remote Sensing in Agriculture and Forest
2016, Pages 249–329, doi:10.1016/B978-1-78548-103-1.50007-8

Author 

Dominique Guyon

Nathalie Bréda

Abstract:

Optical imaging, which makes use of the reflective properties of short wavelength solar radiation (400 to 2,500 nm), is the oldest source of spatial data on which its applications in forestry have been developed.

Keywords

Biomass

Carbon stocks

Forest cover

Forestry

Monitoring

Multispectral Optical Satellite Imaging

Reflectance

Wood volume

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Figure 7.1.

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Figure 7.17.

 Table 7.1

Table 7.1.

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Figure 7.28.

Figure 7.29.

• 1
  The NDVI is the normalized difference in reflectance between the red and the near infrared spectral bands (NIR): NDVI = (NIR-Red)/(NIR + Red).
• 2
  Sum of the surface of the stem cross-sections of all trees in the stand, at 1.30 m above the ground (i.e. at breast height), reduced to one hectare.
• 3
  Average height of the sub-population of trees with access to light, which, in practice, is generally defined as that of the hundred largest trees in the hectare.
• 4
  Field of wavelengths of photosynthetically active radiation, or PAR: 400 to 700 nm.
• 5
  SR = NIR/R.
• 6
  RSR = SR (1 - (MIR −MIRmin)/(MIRmax −MIRmin)).
• 7
  The hot-spot corresponds to the maximum reflection observed on an uneven surface (soil, vegetation…) in the direction of backscattering (where the illumination and viewing directions are collinear). This is related to the fact that the fraction of shadows seen is zero. As soon as one deviates from this direction, the fraction of shadows seen increases and the radiation reflected in this direction is correspondingly decreased.
• 8
  Non-linear transformation of density, assuming each tree to be at the top of an equilateral triangle =  , Sp being the spacing (in meters) and Nha the density (number of trees per hectare).
• 9
  Storm which crossed France in late December 1999.
• 10
  Storm that hit mainly the south west of France in late January 2009.

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