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森林资源的数学统计调查是对林区(总体)进行抽样清查的一种森林调查作业方法,其做去是在林区界内系统地、随机地或综合地设置抽样单位,不同宽度的带,长方形、圆形(固定半径和变换半径)或多边形标准地可做为这种抽样单位。另外还采用一种点状抽样。抽样单位可以在林地单独或成组设置。后者的森林资源清查结果的精度较低,但是可以减少劳动量和作业费。抽样单位的数量取决于给定的精度、蓄积量的变异性和林区内抽样单位的配置。在每个抽样单位对调查数据进行规定的综合测量,随后对全部抽样单位的测量结果进行处理,或者根据规定的任务抽样单位进行分组处理。
The mathematical statistical survey of forest resources is a kind of forest survey operation method of sampling and checking the forest area (overall). The purpose is to systematically, randomly or comprehensively set sampling units, belts of different widths, Rectangles, circles (fixed radii and transformation radii) or polygons can be used as such sampling units. In addition, a point-like sampling is used. Sampling units can be set individually or in groups in the woodland. The latter is less accurate in the inventory of forest resources, but can reduce labor and operating costs. The number of sampling units depends on the given accuracy, the variability in stock volume and the allocation of sampling units in the forest area. The survey data is subjected to a prescribed comprehensive measurement in each sampling unit and then the measurement results of all sampling units are processed or grouped according to the prescribed task sampling units.