| 考虑参数误差的3维空间直线不确定性模型 |
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| 引用本文： | 张国芹,钱靖宇,朱长青,任留成.考虑参数误差的3维空间直线不确定性模型[J].测绘学院学报,2007(5). |
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| 作者姓名： | 张国芹 钱靖宇 朱长青 任留成 |
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| 作者单位： | 信息工程大学测绘学院，盐城卫生职业技术学院，信息工程大学测绘学院，空军指挥学院 河南郑州450052，信息工程大学理学院，河南，郑州450001，江苏盐城224000，河南郑州450052，北京100097 |
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| 基金项目： | 国家自然科学基金资助项目(40501058) |
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| 摘 要： | 由于线元上任一点坐标的误差不仅受端点误差的影响,还会受到长度误差的影响,故不确定性模型要考虑各种影响位置精度的参数误差,对3维空间直线不确定性模型作了进一步研究。不但考虑了端点误差的影响,还顾及了长度误差的影响,使模型在理论上更为严密。理论和实验研究表明,长度误差影响了直线方向的精度。
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| 关 键 词： | GIS 3维空间直线 位置不确定性 长度误差 |
Positional Uncertainty of Spatial Line Segment Considering of Parameters Error |
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| ZHANG Guo-qin,QIAN Jing-yu,ZHU Chang-qing,REN Liu-cheng.Positional Uncertainty of Spatial Line Segment Considering of Parameters Error[J].Journal of Institute of Surveying and Mapping,2007(5). |
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| Authors: | ZHANG Guo-qin QIAN Jing-yu ZHU Chang-qing REN Liu-cheng |
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| Institution: | ZHANG Guo-qin1,2,QIAN Jing-yu3,ZHU Chang-qing1,REN Liu-cheng4 |
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| Abstract: | The error of any point on spatial line segment was affected not only by the error of two end points but also by the error of the lengths,so different parameters error affecting positional uncertainty should be considered in the uncertainty model of spatial line segment.On the basis of these,considering the error of two end points and the error of length parameters,a more research for spatial linear position uncertainty was developed in this paper.The model was more theoretically rigorous.The research shows that the error of length parameters only affects the precision in linear direction. |
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| Keywords: | GIS 3D spatial line position uncertainty length error |
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