It has the necessity to clearly find out the relationship among the many forest composition factors, such as forest conditions, growing surrounderings or artificial infuluenses for getting acculate informations of the present and futur state on forest.
Surely, the useful application of air photo informations with numerical analyzation by electric computor on aboved purposes shall brought the effective development of the sientific forest survey method.
On these purposes, the observation eye field must be clanged from limited necked eye base to variable photo eye's, both are quite different each other.
When we use the air photos as the agency of the actual forest, the factors of the observations composed by forest composition figures from higher position and conditions of their surrounderings.
We can catch many useful informations from this wider eye field on active forest conditions.
In this report, anther discuss the principle and actual method of the estimation on forestry purpose such as stand volume, growth or inferior volume by useing these photo observation factors with multifactor analyzation method, with referencing some results of numerical analysis on natural and artificial forest of Japan.
These method must be read out the higher advancement of the systematic application of photo interpretation in more wider use.
