| 考虑边界约束的DTM三角网模型生成算法研究 |
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| 引用本文： | 廖振修,汪东林.考虑边界约束的DTM三角网模型生成算法研究[J].合肥工业大学学报(自然科学版),2011(9):1381-1384. |
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| 作者姓名： | 廖振修 汪东林 |
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| 作者单位： | 安徽建筑工业学院土木学院; |
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| 基金项目： | 高等学校省级优秀青年人才基金资助项目(2010SQRL085ZD); 安徽建筑工业学院硕博科研启动资金资助项目(20080904) |
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| 摘 要： | 无约束的数字地面模型(DTM)空间三角网算法生成的三角网外围边界是一个凸壳,这对于实际区域为凹多边形的区域(如公路弯道)会有较大的模拟失真.文章提出一种改进的算法,通过分析实际边界多边形的精细度影响因素,导出确定区域相邻离散点平均边长的计算方法,进而确定一个边界多边形边长的最大值.以该边长最大值对无约束的三角网外围边界...
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| 关 键 词： | 数字地面模型 空间三角网 凸壳 边界约束 |
Research on DTM TIN generation algorithm considering border restriction |
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| LIAO Zhen-xiu,WANG Dong-lin.Research on DTM TIN generation algorithm considering border restriction[J].Journal of Hefei University of Technology(Natural Science),2011(9):1381-1384. |
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| Authors: | LIAO Zhen-xiu WANG Dong-lin |
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| Institution: | LIAO Zhen-xiu,WANG Dong-lin(School of Civil Engineering,Anhui University of Architecture,Hefei 230022,China) |
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| Abstract: | In the unrestricted digital terrain model(DTM),the spatial triangulated network border created by the triangulated irregular network(TIN) generation algorithm is a convex hull.It would be a distorted result if the convex hull was used to simulate the concave polygon region such as the curve of highway.An improved generation algorithm of TIN is presented in this paper.By analyzing the factors affecting the subtle degree of bounded polygon,a formula is deduced to calculate the averaged length of border point ... |
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| Keywords: | digital terrain model(DTM) spatial triangulated network convex hull border restriction |
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