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首页> 外文期刊>Emerging themes in epidemiology >Choosing a survey sample when data on the population are limited: a method using Global Positioning Systems and aerial and satellite photographs
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Choosing a survey sample when data on the population are limited: a method using Global Positioning Systems and aerial and satellite photographs

机译：当人口数据有限时选择调查样本：一种使用全球定位系统以及航空和卫星照片的方法

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Background Various methods have been proposed for sampling when data on the population are limited. However, these methods are often biased. We propose a new method to draw a population sample using Global Positioning Systems and aerial or satellite photographs. Results We randomly sampled Global Positioning System locations in designated areas. A circle was drawn around each location with radius representing 20 m. Buildings in the circle were identified from satellite photographs; one was randomly chosen. Interviewers selected one household from the building, and interviews were conducted with eligible household members. Conclusions Participants had known selection probabilities, allowing proper estimation of parameters of interest and their variances. The approach was made possible by recent technological developments and access to satellite photographs.
机译：背景技术已经提出了在人口数据有限时进行采样的各种方法。但是，这些方法经常有偏差。我们提出了一种使用全球定位系统和航空或卫星照片绘制人口样本的新方法。结果我们随机抽样了指定位置的全球定位系统位置。在每个位置周围绘制一个圆，半径代表20 m。从卫星照片中识别出圈内的建筑物;一个是随机选择的。访调员从建筑物中选出一个住户，并与合格的住户成员进行了访谈。结论参与者具有已知的选择概率，可以正确估计感兴趣的参数及其方差。最近的技术发展和获取卫星照片使这种方法成为可能。

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