利用航片可准确的测定林分平均高,但在航片上测定林分年龄较困难,可利用在航片上测定的林分平均高与实地调查的林分年龄的回归关系来求得林分年龄。从而达到利用航片确定地位级的目的。经和实地调查比较表明,利用航片确定地位级是可行的,且定量准确、省工、方便。 Airborne species can be used to determine the average height of the forest. However, it is more difficult to determine the age of the forest on the aerial photos. The regression relationship between the average height of the forest measured on aerial photos and the stand age of the field survey can be used to determine the stand age . So as to achieve the purpose of using aerial photos to determine the status level. The survey and field comparison show that the use of aerial photographs to determine the status level is feasible, and quantitative accurate, labor-saving and convenient.