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Citation:

Timber Cruising with Point Sampling and Product Estimator

  • Received Date: 1993-11-23
  • A sampling procedure for volume estimation is presented,in which volume is computed as the product of average basal area per hectare and average volume-basal-arearatio(R).The basal area estimate is obtained by point sampling,and R is estimated by subsampling point/sampled trees.Expression for the variance of the product estimator is also given.Simulated tests show that for the same degree of precision,using this sampling method is over that of the double sampling for ratio estimator.
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通讯作者: 陈斌, bchen63@163.com
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Timber Cruising with Point Sampling and Product Estimator

  • 1. Forest Resources College, Beijing Forestry University Beijing 100083

Abstract: A sampling procedure for volume estimation is presented,in which volume is computed as the product of average basal area per hectare and average volume-basal-arearatio(R).The basal area estimate is obtained by point sampling,and R is estimated by subsampling point/sampled trees.Expression for the variance of the product estimator is also given.Simulated tests show that for the same degree of precision,using this sampling method is over that of the double sampling for ratio estimator.

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