THE ANALYSIS OF MAIN TREE MEASURATION FACTORS BY USING LARGE SCALE AERIAL PHOTOS
- Received Date: 1990-02-28
- Available Online: 2012-12-04
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.