A Purposive Sampling Design Method Based on Typical Points and Its Application in Soil Mapping
基于典型点的目的性采样设计方法及其在土壤制图中的应用

In consideration of limitations of classical sampling and spatial sampling,this paper proposed a purposive sampling method based on typical points.This method employed environmental factors which co-vary the target geographical element to find typical patterns of the geographical element over space.Field samples were then designed based on the locations of these typical patterns.It is believed that these field samples capture the overall pattern of spatial variation of the target variable well.With this app...