Utilization and Modification of Point Sampling and Line Sampling in the Forestry Survey | Science Publications

American Journal of Biostatistics

Difei Zhang¹ 

关键词: Point sampling;    line sampling;    forest sampling;    horizontal gauging;    tree basal area;   

DOI  :  10.3844/amjbsp.2010.67.74

学科分类：卫生学

来源: Science Publications

【 摘 要 】

Problem statement: In the practice of conventional point sampling and line samplingmethods in the forestry survey, we often encounter problems such as boundary and hole problems.These problems could introduce bias in the results of forest sampling. Proper modifications are needed.Approach: This study developed novel probability computation approaches in the utilization andmodification of horizontal point sampling and line sampling in the forestry inventory. It reviewedconventional point sampling and line sampling methods, identifies specific problems associated withactual forest sampling and provides modification solutions using probability computations. Results: Bymodifying the original point sampling and line sampling procedures, this study proposed novelsolutions to these problems and provides better sampling methods with reduced bias in the forestrysurvey. Conclusion: In this study, only horizontal gauging for point sampling and line sampling wasdiscussed. For the corresponding problems encountered in vertical gauging, the solutions are similar tothe ones for the horizontal gauging sampling. These modifications had been presented with varyinglevels of complexity. To maintain a balance between precision and costs, modifications with anappropriate level of complexity may be selected.

【 授权许可】

Unknown