New method for extracting plantation boundary using temporal aerial photos

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  • 時系列空中写真を用いた人工林小班区画抽出手法の開発
  • ジケイレツ クウチュウ シャシン オ モチイタ ジンコウリン ショウハン クカク チュウシュツ シュホウ ノ カイハツ

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Abstract

We propose a new method of extracting plantation boundary through multi-temporal image analysis using past aerial photos which have been taken by the Forestry Agency and the Geographical Survey Institute, Japan. The seven aerial photo images from 1963 to 2002 were ortho-rectified, the succeeding two-year images were combined, and image classification of this two-year composite data was carried out. Clear cut and planted sites were extracted with the second principal component of the principal component analysis of a two-year composite image of brightness or DSM data This proposed method presented the possibility to delineate the boundary of the planation. Comparing the final map with existing GIS data, the unconformity of boundary information and the inconsistency of stand age were pointed out, consequently the validity of this new method was confirmed.

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