但另一方面，我国用材林面积和单位面积上森林蓄积量都在锐减，这就在客观上增加了伐区区划和主伐调查设计的劳动量和劳动强度。
On the other hand, the area of usable forest and the volume of standing timber in one unit area are descending sharply in our country, which aggravates the labor intensify impersonally.
在林业生产中，地图更是占有重要的地位，各级林业区划、规划、森林资源清查、森林经理调查、伐区作业设计等都离不开地图。
In forestry, map also occupies an important position, the all levels forest division, forest planning, the forest resources inventory, the forest management inventory, felling series design etc.
森林土壤取样的研究结果表明：基于设计的取样策略主要建立于传统的调查取样的基础上，需要多少样本，研究区应设定多大范围是设计考虑的主要内容。
Result of forest soil sampling indicates that: design-based approach is mainly based on the traditional investigation, the number of samples and study area are mostly considered by this approach.
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