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1.伐区图绘制 伐区图是三类调在的重要成果。图上的伐区面积、形态、小号线、集材道、楞场及所在林班等信息,满足了林场采伐工作的需要。但是这种图的小班界转绘到二类调查的基本图和林相图上比较困难,从而使林场森林资源档案难以搞准,以至失真。其原因是二、三类调查的图上缺少控制点,所谓控制点是指代区图在转绘到二类调查成果——1:2.5万的基本图上时起定位和控制作用的点,是转绘的依据。这种控制点在伐区图上有显示或文字说明,在二类调查的基本图上也
1. Cutting Map Drawings Cutting plans are three important achievements in the transfer. Information on the area, shape, trumpet line, timber road, stalagmites and forestry classes of the cutting area on the map meets the needs of logging work in the forest farm. However, it is more difficult for the small group of this kind of map to be transferred to the basic map of the second kind of survey and to the forest map, making it difficult to accurately and even distort the forest resources files of the forest farm. The reason is that there is a lack of control points on the maps of the second and third types of surveys. The so-called control points refer to the points where the positioning and control functions on the basic maps of the 1: Is painted on the basis. This control point is shown on the cutting plot or text description, in the basic map of the second survey also