基于三角形网格的气象场等值线自动分析

Automatic Drawing of Contours Based on Triangle-Mesh Meteorological Fields

针对矩形网格法的不足 ,提出了用三角形网格法实现气象场等值线自动分析方法。通过对站点资料的边界插值、三角形剖分等处理后 ,再在剖分出来的三角形网格中按照一定方式连接等值线即可实现等值线的自动分析。给出了等值线自动生成算法 ,并将实例的分析结果同Grads绘制图进行对比分析。结果表明 ,该方法不仅有效可行 ,而且分析的结果更为精确合理。

Considering shortcomings of the rectangle-mesh method,a method is proposed for drawing automatically meteorological contours by using triangle-meshes. The auto-drawing of contours was realized through interpolating on sides, triangulating,and then connecting the contours on the triangulated meshes in certain order. The algorithm of contour auto-generating is given and the contour charts drawn by the rectangle-mesh method and Grads are compared. The results show that the method is practicable and the resulting outcome is more accurate and reasonable.