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Citation:

THE ANALYSIS OF MAIN TREE MEASURATION FACTORS BY USING LARGE SCALE AERIAL PHOTOS

  • Received Date: 1990-02-28
  • B/W aerial photos of the scale 1:2600 were adopted in a test area of Changbeishan Mountain,Jilin Province.Its purpose was to investigate the feasibility of using stereoscopic measurement on air photos to replace some of field work of tree measuration,for the comparision of practical measuration result with that on air photos.The growth classes were divided for the calipered living stocks.And the proportion of suppressed trees that couldn't be identified on the air photos was worked out.The compensation table for the unmeasured trees was established according to the measuration regularity on air photos.The average square error of the experiment on tree height measurement was ±1.07m.The large scale air photos showed a bright practical prospect.
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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THE ANALYSIS OF MAIN TREE MEASURATION FACTORS BY USING LARGE SCALE AERIAL PHOTOS

  • 1. The Research Institute of Forest Resources Information Technique CAF
  • 2. Zhejiang Forest University
  • 3. The Forest Bureau of Linjiang County, Jilin Province
  • 4. The Second Brigade of Forest Survey, Heilongjiang Province

Abstract: B/W aerial photos of the scale 1:2600 were adopted in a test area of Changbeishan Mountain,Jilin Province.Its purpose was to investigate the feasibility of using stereoscopic measurement on air photos to replace some of field work of tree measuration,for the comparision of practical measuration result with that on air photos.The growth classes were divided for the calipered living stocks.And the proportion of suppressed trees that couldn't be identified on the air photos was worked out.The compensation table for the unmeasured trees was established according to the measuration regularity on air photos.The average square error of the experiment on tree height measurement was ±1.07m.The large scale air photos showed a bright practical prospect.

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