基于网格法的等值线绘制方法

等值线是一种形和数的统一。在许多领域是成果数据表示的重要图件之一。时工程应用中的等值线图的绘制方法进行了研究，常规的等值线绘制方法分为矩形网格法和不规则三角形网法2种，矩形网格法具有算法简单的优点。其绘制的步骤一般为：离散数据网格化、网格点数值化、等值点的计算、等值线的追踪、光滑和标记等值线。详细阐述了采用矩形网格法绘制的步骤及其计算机实现。采用Delphi开发了运用该法绘制等值线的软件，可应用于不同的操作平台，移植性好。

A Method for Isoline-plotting Based on Rectangular Grids

Isoline is the unification between shape and data. It is one of the important graph to express the harvest datas in many fields. The method of isoline plotting in the project application is researched. There are two groovy methods of isolineplotting, one kind is the algorithm of rectangular grids, and another kind is the algorithm of triangulated irregular network. The process of isolineplotting has the following steps, which are gridding the dispersed datas, numerating the grid points, calculating the equivalent points, tracing the isoline, smoothing and marking the isoline. Expatiate the process of isolineplotting with rectangular grids and the method how to come ture it by computer. The software that is developed by Delphi through this method can apply to the different operation flat. It has a good transplant.