化探异常曲线图中采样坐标投影的方法

在用Grapher5.0绘制化探异常曲线图中,纵坐标为各元素化验结果数据,横坐标为采样点的位置。但由于GPS定位的误差,一条化探剖面的样品采样位置并不全部在设计剖面线上,为了解决这一问题,现将每个采样位置的坐标沿岩层走向方向(垂直投影,剖面线方位与岩层走向垂直)投影到剖面线上,通过对采样位置与剖面线方位之间三角函数关系的研究和分析,得出了平面内任意一采样点坐标与任意方位剖面线之间的投影关系,实现了将每个采样位置的坐标垂直投影到设计化探剖面线上,提高了化探异常曲线的准确性。

The method of Geochemical anomalies in the graph sampling coordinate projection

In the compilation of geochemical anomaly illustration with Graphier 5.0 software, the vertical axis presented the measurements of each elements and the horizontal axis presented the sampling location. Usually, some of the sampling locations are deviated from the designed sampling profile that due to the error of the GPS （Global Position System）. Our study proposed one method to minimize this error with the aims to elevate the accuracy of the values of geochemical measurements. According to the following steps, project each of sampling location positions on the designed profile along the strike of the stratigraphy, based on the analyses of the trigonometry function associations between actual sampling locations and projective point locations. Then we obtained the correlativity between each random sampling positions and each given profiles. Through this processe, each of sampling position projected vertically on a presupposed geochemical detection profile that advanced the precision and accuracy of the geochemical anomaly determination.