考虑参数误差的严密线元不确定性模型

Rigorous Positional Uncertainty of Line Primitive Consideration of Parameters Error in Geographic Information System

在分析误差带模型研究成果的基础上，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；解释了线元误差分布特点；阐述了误差带宽的确定。

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.