基于拓扑数据模型的三维宗地合并与分割算法

来源 :测绘科学 | 被引量 : 9次 | 上传用户:clxzzx
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
三维宗地是宗地在三维空间的扩展,其合并与分割是三维地籍最常用、最基本的功能。在给出数据结构基础上,提出基于拓扑数据模型的三维宗地合并与分割算法。其中,合并算法通过查找公共面,获取公共面集,设立拓扑取舍准则,删除舍弃的边与顶点,合并被删除的边和顶点所属的共平面的面与边,更新对应的体与面实现。分割算法通过边分裂,以新生成边替换原始边;面分裂,以新生成面替换原始面;体分裂,以新生成体替换原始体实现。为验证算法,建立了实验原型系统,实验结果表明:算法有效、可行。
其他文献
Ateam of Peking Opera warriors appeared on the stage in colorful costume and played drums accompanied by impassioned music in jazz-like, modern tempo - you might suspect that this was a scene from an
期刊
A 7.0 magnitude earthquake hit Lushan County of Yaan in south Chinas Sichuan Province at 08:02 Beijing Time on April 20, 2013. With a solid foundation of science and technology and a lofty sense of mi
期刊
"Regardless of the particular reason an observation system was put in place, we are expanding the use of the data from that system to help users in other areas," Ms. Barbara Ryan answered when asked a
期刊
"It is a very wonderful story to tell," in the interview with BCAS reporter SONG Jianlan before the opening of the 35 th International Symposium on Remote Sensing of Environment (ISRSE), Dr. Ghassem R
期刊
BCAS: It is the first ime that an ISRSE symposium is held in China. Whats your impression about this meeing? Dr. Briggs: This is about the 7 th or 8 th of ISRSE meetings which I attended over the last
期刊
BCAS: Nice to meet you in Beijing Dr. Campbell. You are a disinguished scienist in remote sensing. Would you like to introduce a litle bit about yourself? Dr. Campbell: I joined Canada Center for Remo
期刊
Remote sensing, which came into being at the first International Symposium on Remote Sensing of Environment (ISRSE) 50 years ago, has enabled people to obtain objecive and realistic spatial and tempor
期刊
Based on NECP/NCAR reanalysis data and daily temperature data of 743 stations in China, possible causes of winter extreme low temperature events are explored from the perspective of the synoptic-scale
期刊
The radiometric calibration of remote sensors is a basis and prerequisite of information quantification in remote sensing. This paper proposes a method for outdoor relative radiometric calibration usi
期刊
POS辅助航空摄影测量中会存在视准轴误差和空间位置偏心差,其会对最终结果精度产生较大的影响,传统的飞行检校方法存在耗费大以及对天气、空域等因素的要求高等特点,不方便进行经常性检校工作。本文提出了一种基于地面检校场的检校方法,并详细推导出误差解算数学模型,同时利用建立好的地面检校场设计试验,最后的试验结果证明了该方法的正确性。
期刊