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绪言研究地球表面情况没有比使用航空照片更适当的方法,也如地形测图在长远发展历史过程中,能使用航空摄影测量的方法一样。因此农场,森林,矿物和水力等自然资源的勘察都利用了这种新技术进行调查,但却没有象利用照片在立体空间影象上那样清楚而显着地详细研究森林更为适应。在航空照片上量测林木和林分材积,其广大基础在于应用摄影测量原理和应用地形图一样。
INTRODUCTION There is no more appropriate way to study the surface of the earth than to use aerial photographs, as is the use of aerial photogrammetry in topographical history in the long history of evolution. Therefore, surveys of natural resources such as farms, forests, minerals and water use the new technology to investigate but are not more adapted to the detailed and explicit study of forests as clearly as the use of photographs in stereoscopic images. Measuring the volume of forest and stand volume on aerial photographs is based on the application of photogrammetry principles and the application of topographic maps.