应用MAPGIS制作地球化学图单元素异常图及综合异常图

利用MAPGIS离散数据网格化模型绘制地球化学图,通过四种不同的网格化方法效果对比,在元素含量分析数据极差相对较小时,采用Kring泛克立格法网格化模型绘制的地球化学图效果佳。分析数据极差相对较大时,采用距离幂函数反比加权网格化模型绘制的地球化学图效果较好。两种数据网格模型绘制的地球化学图均达到化探规范中对地球化学图的要求,因此提出了应用MAPGIS制作地球化学等含量线图,利用地球化学等含量线图的属性,绘制单元素异常图及综合异常图。

Application of MAPGIS in Creating Geochemical, Single Element Anomaly and Comprehensive Anomaly Maps

Using MAPGIS meshing model of disperse data for plotting geochemical map,compared with effects from four types of different meshing way,when analytic data range of elementary content is relative small,the effect is good by Kring logarithmic meshing model for geochemical map.When extreme difference of analytical data is large,the geochemical map is favorable by meshing model of inverse distance power function weighting.Geochemical maps made by two kinds of data both come up to the required standard,therefore it is presented that creates geochemical isoline map with MAPGIS and plots single element anomaly and integrated anomaly maps by geochemical isoline.