| 用规则四方矩阵网格资料分析等值线的一种方法 |
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| 引用本文： | 张蔺廉,范其平.用规则四方矩阵网格资料分析等值线的一种方法[J].气象,2006,32(6):75-78. |
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| 作者姓名： | 张蔺廉 范其平 |
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| 作者单位： | 浙江省舟山市气象局,316004 |
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| 摘 要： | 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。一是利用成图规则构造顶点绘制不规则点的平滑曲线；二是采用“三象限扫描法”追踪网格各等值点。结果与手绘图一致，线条流畅、准确，响应较快，对于开发自已的软件工具有一定的借鉴意义。
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| 关 键 词： | 等值线 B样条三次曲线 三象限扫描法 等值点追踪 |
| 收稿时间： | 08 24 2005 12:00AM |
| 修稿时间： | 2005-08-242005-12-15 |
A Method of Using Grid Data of Regular Square Matrix to Realize Drawing Contours |
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| Zhang Linlian,Fan Qiping.A Method of Using Grid Data of Regular Square Matrix to Realize Drawing Contours[J].Meteorological Monthly,2006,32(6):75-78. |
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| Authors: | Zhang Linlian Fan Qiping |
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| Institution: | Zhoushan Meteorological Office, Zhejiang Provine 316004 |
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| Abstract: | To realize searching synoptic situations, a method of drawing contours is introduced, which is based on grid data of regular square matrix. Firstly, controlling points are added according to plotting rule and irregular points linked with smooth curve. Secondly, to catch equivalent points, the method of scanning in three quadrants is put forward. The result is similar to the handmade, the lines are proper and smooth, the procedure responds quickly, and there are certain reference meanings for making our own software. |
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| Keywords: | contour B-spline cubic curve method of scanning in three quadrants catching equivalent points |
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