In order to determine the optimum scale and band of forest aerial photography

determine-the enlargement of photo

interpretation in the experimental sites of Nankunshan

Guangong province carried out the following tests

namely determination of the spectrum of ground objects

multiple spectrum and colour infrared photograph in different scales

office interpretation

field survey and complex analyse. This article discussed the influence of aerial camera

film

coefficient of reflection of object spectrum and photographic displacement on resolving power. It also estimated the resolving power of photo image in Nanjunshan with the experimental relationship-formula and illustrated the interpretation in room and field survey. The breif conclusions are as follow: 400-800um in green band is the best for aerial forest photograph. The resolution of photo for forest interpretation is enlarged to 3.5 line/mm. If new type camera and film with high resolving power are used

photo-scale for classfication of forest resource will be decreased to 1:48000.