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一、试验目的森林面积的动态变化是森林资源变化中极重要的一项因子,也是比较难于监测的一项因子。常规航测成图的全面调查方法,从经济上,时间上都不可能胜任这项工作。当前,电子计算机自动分类成图在林业上还存在不少问题,精度和技术上尚不能满足生产要求。因此,用新、旧航空象片,应用抽样技术进行森林面积和各种土地类型面积的动态监测,是适合我国目前技术水平的一种切实可行的方法。
First, the purpose of the experiment Dynamic changes in forest area is an extremely important factor in the changes of forest resources, but also a more difficult to monitor a factor. General survey of conventional aerial mapping method, from the economic, time can not be competent for this work. At present, the computer automatically classified into map in the forest there are still many problems, accuracy and technology can not meet the production requirements. Therefore, dynamic monitoring of forest area and various types of land using new and old aerial photographs and application of sampling techniques is a feasible method suitable for the current technological level in our country.