基于等高线的水系沉积物采样点自动布设方法

Contour-based automatic layout method of stream sediment sampling sites

以往水系的勾绘、采样点位的布设工作均由人工在地形底图上手工完成,工作量大,且影响化探工作进度。通过规则网格的数字高程模型生成水系网,实现了精确度较高的水系网提取算法。该算法先按照水系级别和水系长度进行样点初布,然后检测样点的数量及密度是否达到要求,再根据布样要求进行样点的补充与修改,据此研究水系沉积物采样自动化布置方法,实现基于等高线的水系沉积物采样点的自动布设,提高了化探采样工作效率。

In the past, the mapping of drainage systems and the layout of sampling sites have been done manually on topographicmaps, which are arduous and affect the progress of geochemical exploration. This paper uses the digital elevation model of the regulargrid to generate the drainage network, and thus to implement drainage network extraction algorithm of higher accuracy. This algorithmfirstly conducts a preliminary layout of the drainage network sites based on their grade and length, then ensures that the number anddensity of the sites meet related standards, and modifies and supplements the layout according to standards of sampling arrangement.Based on this, the automatic arrangement method for the sampling of the stream sediment is studied, and the automatic sampling of thestream sediment based on the contour lines is realized for the first time, thus improving the efficiency of geochemical sampling.