多种软件联合实现等值线快速绘制的制图模式

THE CONSTRUCTION OF THE MAPPING MODE FOR QUICK DRAWING OF CONTOURS BY USING VARIOUS KINDS OF SOFTWARE

针对地震解释成图的特点,提出了一种多种软件联合绘制等值线的制图模式,它包括用Excel取数据、用Surfer网格化模型自动绘制等值线、用AutoCAD修改等值线和用MapGIS处理成图4个步骤。应用该制图模式减少计算工作量,避免人为误差,实现了高精度高效率地勾绘有构造的等值线。通过实例对比线性内插的三角网法、距离倒数乘方法、最小曲率法、径向基本函数法和克立金法这5种网格化法的特点,说明克里金网格化模型绘制等值线的效果最佳,以及AutoCAD比MapGIS在编辑修改等值线图形时的优异之处。

In the light of characteristics of seismic interpretation and structural map, this paper deals with a mapping mode for quick production of structural contours by using various kinds of software, such as four processes for calculation of an XYZ data in Excel, automatic creation of a contour map using the gridding method in Surfer, completion of a more logical contour map in AutoCAD, and more perfect processing of the logical contour map in MapGIS. The mapping mode can help reduce the workload, avoid artificial errors, and realize the drawing of structural contours with high precision and efficiency. By producing grid files using five different gridding methods and comparing the results in practical application, this paper gives a quick overview of each gridding method and points out advantages and disadvantages of each method. The five Gridding methods include Triangulation with Linear Interpolation, Inverse Distance to a Power, Minimum Curvature, Radial Basis Function and Kriging. Under most circumstances, kriging is the selected default gridding method because it gives better results for most XYZ data sets. In addition, the merits of AutoCAD relative to MapGIS in editing and revising contours are emphatically discussed.