Assessment of Uncertainity in Spatially Systematic Sampling

Assessment of Uncertainity in Spatially Systematic Sampling
复制标题

空间系统抽样的不确定性评估

DOI:
10.1007/1-4020-4381-3_10
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发表时间:
2005
期刊:
The American journal of physiology
影响因子:
--
通讯作者:
J. Heikkinen
J. Heikkinen
中科院分区:
--
文献类型:
--
作者:
J. Heikkinen

文献摘要

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在库存区域内分布样地的最佳方式是什么?在缺乏关于该地区的任何具体先验知识的情况下,通常建议采用简单随机抽样(SRS,第2.2节),因为它具有客观性,而且易于获得基于设计的不确定性评估。然而,SRS可以很容易地将一些样地定位在非常接近的位置,并在其他地方留下很大的缺口。直观地说,通过将地块均匀地分布在库存区域,将获得更具代表性的样本(图10.1)。
What is the best way to distribute sample plots over an inventory area? In the absence of any specific prior knowledge about the area, simple random sampling (SRS, section 2.2) is often recommended because of its objectivity and readily available design-based assessment of uncertainty. SRS can easily locate some sample plots very close together, however, and leave large gaps elsewhere. Intuitively, a more representative sample would be obtained by spreading the plots evenly over the inventory area (Figure 10.1).