VBA和MapGIS在化探异常解释评价中的应用

化探异常下限的确定和图件的编制是化探异常解释评价工作最基础也是最关键的。笔者通过多年的探讨和实践,将VBA与MapGIS结合起来运用到化探异常解释评价工作中,取得了一些成效。文中,笔者以均值加2倍离差方法为例,探讨了运用VBA编程计算确定化探异常下限的基本思路和一般方法,详细介绍了离散点位数据图在MapGIS中直接成图的方法,指出了VBA与MapGIS在地矿行业中具有广阔的应用前景。

THE APPLICATION OF VBA AND MAPGIS TO THE INTERPRETATION AND APPRAISAL OF GEOCHEMICAL ANOMALIES

The calculation of the lower limit of the geochemical anomaly and the map compilation are of key and basic importance in the interpretation and appraisal of geochemical anomaly.This paper deals with the determination of the threshold of the geochemical anomaly with VBA programming based on average value and two times of standard deviation,and the method for direct compilation of the discrete point position map with MapGIS.The VBA and MapGIS were combined with each other and applied on the basis of the authors' experience, with satisfactory result obtained. It is pointed out that VBA and MapGIS have wide application prospects in geology and mining industry.