Koji HONDA

A Study of Optimum Use of Estimated Value of Forest Cover Density Using MODIS Data

Yukio MUKAI, Atsushi RIKIMARU

Satellite data with wide area coverage and high frequent observation are effective for forest observation of global scale.
This study consists of following three parts;
Data used are Orthophoto,SPOT5/HRG Multi-Spectral data, LANDSAT-ETM+ data, and TERRA/MODIS data of Niigata Prefecture of Japan.
1)Development of the semi-automatic calculation technique of forest canopy density from orthophoto images. 2) Application of FCD model with variety satellite data and inspect of their validity. 3) Development of a self-diagnostic method of estimation accuracy of forest cover density using MODIS data. For the topic 1) In the forest canopy density calculation from the orthophoto image, green band was emphasized in order that the values of the shade parts in a forest canopy increase. For the topic 2) Estimated value of FCD was computed by application of the FCD model to Satellite data. Then, the estimated value of FCD of SPOT5/HRG Multi-Spectral data and LANDSAT-ETM+ data were compared with the forest canopy density calculated by the orthophoto images. And Estimated value of FCD of LANDSAT-ETM+ data and TERRA/MODIS data were compared. For the topic 3) The relation between the estimated value of FCD and difference of day-night temperature was used.
As the results of this study are summarized as follows;
1) Development of the efficient way to create the verification data from the orthophoto images.2) Correlation was found between the satellite data and the orthophoto images. And correlation was found between each satellite data.3) The validity of a self-diagnostic method was suggested.