気球を利用した簡易空中写真による森林調査

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  • The Description of a Forest through an Aerial Photographic Survey using a Balloon
  • キキュウ オ リヨウシタ カンイ クウチュウ シャシン ニヨル シンリン チョ

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抄録

Aerial pictures taken of a forest from an altitude of several thousand meters can only provide limited details for the interpretation of a forest. Therefore, we decided to attempt simple aerial photography using a balloon (hereinafter called balloon pictures) and performed the experiment in hopes of providing better forest interpretation. The details of the experiment are as follows:<BR>1) It was an effective aid in the topographic interpretation of the various kinds of trees, grasses and herbs. Pictures taken at an altitude up to 50 meters were effective in helping to identify grasses and herbs. Pictures taken at an altitude between 50 and 100 meters clearly defined shrubs for identification. At an altitude between 100 and 300 meters, the pictures clearly defined individual stands of trees.<BR>2) It was helpful in the regular observation of vegetation aspects and made it possible to identify their seasonal changes.<BR>3) It provided a means to precisely measure the heights of trees.<BR>4) It was used for investigating the distribution of naturally growing Picea jezoensis. While balloon pictures provide very accurate information, they only cover small areas, are difficult to take in a strong wind, and the direction of the pictures is not very stable. Our future tasks include correcting these drawbacks and utilzing balloon pictures in other fields such as landscape architecture.

収録刊行物

  • 造園雑誌

    造園雑誌 46 (5), 105-110, 1982

    社団法人 日本造園学会

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