Abstract
This paper describes the vigor investigation of street trees using the multispectral photographs which has been taken at a low altitude by the aircraft.
The method of this vigor investigation used jointly the interpretation on the ground and the multispectral viewer's screen and inquired some factors which would influence the vigor of street trees. The authors analyzed and explained the dependence of effect on cause. As a result of this, the vigor could be explained about 70 percents by the waste gas on the structure of city.
Moreover, the authors estimated the future vigor with the date of analysis result and some informations and considered a counterplan.
