| 封闭曲线裁剪算法在矢量地图显示中的应用 |
| |
| 引用本文： | 安添琳.封闭曲线裁剪算法在矢量地图显示中的应用[J].东北测绘,2012(8):170-172. |
| |
| 作者姓名： | 安添琳 |
| |
| 作者单位： | [1]兰州交通大学数理与软件工程学院,甘肃兰州730070 [2]中国测绘科学研究院,北京100830 |
| |
| 摘 要： | 在参考经典Sutherland-Hodgeman裁剪算法的基础上,实现了封闭曲线裁剪算法,使得裁剪结果成为原被裁剪封闭曲线的局部线段。本算法应用在2维矢量地图缩放显示中,通过矩形裁剪窗口裁剪矢量图并显示,从而提高整幅矢量图的显示速度。实验表明,该新算法能够简单、高效、准确地裁剪出理想的线段,并在很大程度上提高2维矢量图的显示速度。
|
| 关 键 词： | 裁剪 封闭曲线 显示速度 |
Application of Closed-Curve Clipping Algorithm in Vector Map Display |
| |
| AN Tian-lin.Application of Closed-Curve Clipping Algorithm in Vector Map Display[J].Northeast Surveying and Mapping,2012(8):170-172. |
| |
| Authors: | AN Tian-lin |
| |
| Institution: | AN Tian-lin,(1.School of Mathematics,Science and Software Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China; 2.Chinese Academy of Surveying and Mapping,Beijing 100830,China) |
| |
| Abstract: | Based on the classical Sutherland-Hodgeman Clipping algorithm,this paper realizes the closed curve clipping algorithm,making the clipping result a series of unclosed curves generated from the original closed curve.This algorithm is used in the zooming-display of two dimensional vector maps,clips and displays the vector map through rectangular clipping window for the purpose of improving the speed of data display.Experiments show that the new algorithm is simple,effective and accurate,and improve the speed of display to a great extent. |
| |
| Keywords: | clipping closed curve display speed |
| 本文献已被 维普 等数据库收录！ |
|
