contours drawing 等值线绘制
The NCAR Graphics home page provides a stable UNIX package for drawing contours, maps, surfaces, weather maps, x-y plots, and many others.
NCAR Graphics主页提供了一个稳定的UNIX包用来绘制轮廓图、地图、表面图、气象图、x - y图以及很多其他图形。
To realize searching synoptic situations, a method of drawing contours is introduced, which is based on grid data of regular square matrix.
介绍用规则四方矩阵网格资料绘制等值线，实现天气形势检索的思路方法。
Image where the contours are to be drawn. Like in any other drawing function, the contours are clipped with the ROI.
第一个参数表示输入图像，函数将在这张图像上绘制轮廓。
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