| 考虑参数误差的严密线元不确定性模型 |
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| 引用本文： | 童小华,杨东援.考虑参数误差的严密线元不确定性模型[J].同济大学学报(自然科学版),1999,27(6):658-662. |
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| 作者姓名： | 童小华 杨东援 |
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| 作者单位： | 同济大学测量与国土信息工程系!上海200092(童小华，刘大杰)，同济大学道路与交通工程系!上海200092(杨东援) |
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| 基金项目： | 国家自然科学基金!（49671065） |
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| 摘 要： | 在分析误差带模型研究的基础上，从概率统计和误差传播理论出发，考虑线元端点以及量测距离的误差，导出了更为严密、准确的线元不确定性模型；解决了线元误差分布特点，阐述了误差带宽的确定，并对其计算结果和可视化进行了分析和讨论。
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| 关 键 词： | 不确定性 线元 地理信息系统 GIS 参数误差 |
Rigorous Positional Uncertainty of Line Primitive Consideration of Parameters Error in Geographic Information System |
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| TONG Xiao-hua ,LIU Da-jie ,YANG Dong-yuan.Rigorous Positional Uncertainty of Line Primitive Consideration of Parameters Error in Geographic Information System[J].Journal of Tongji University(Natural Science),1999,27(6):658-662. |
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| Authors: | TONG Xiao-hua LIU Da-jie YANG Dong-yuan |
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| Institution: | TONG Xiao-hua 1,LIU Da-jie 1,YANG Dong-yuan 2 |
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| Abstract: | A new positional error model for describing the uncertainty of line primitives in GIS is developed in this paper. Considering not only the errors of two end points but also the errors of the measured distances in the line segment, the model in more theoretically rigorous. The reason that the characteristic of error distribution of the line is explained by this model. The determination of error band width is anlyzed. With a case study and visualization, the model is tested and some conclusions are reached. |
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| Keywords: | uncertainty model line primitive error propagation geographical information system |
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