摘要
三维空间数据的不确定性研究,对GIS应用、分析、决策的正确性和可靠性极为重要。根据确定空间直线元的空间两点,来分析研究空间直线元上任意点的不确定性,同时对其长度、方向以及空间折线、空间折线环的总长度的不确定性进行估计,经Matlab编程实现上述各算法和算例。实例表明空间直线上任意点的不确定性,其精度至少要高于确定该直线的其中一点的精度。
With the development of 3D GIS model, it is necessary to study uncertainty estimation of 3D spatial data serial, which has great significance for validity and preciseness of application, analysis and decision of GIS. According to the two spatial points which form the spatial line unit, uncertainty estimation of arbitrary points on the spatial line unit, is analysed to estimate the length uncertainty, deflection uncertainty of spatial line unit and total length uncertainty of spatial broken line, spatial link formed with broken lines, and realizes various arithmetic and illustrations through programming with Matlab Language. The results show that uncertainty preciseness of arbitrary points on the spatial line unit is higher than that of either point.
出处
《桂林工学院学报》
2003年第3期304-309,共6页
Journal of Guilin University of Technology
基金
广西区科技厅资助项目(桂科攻03308-7)
关键词
空间直线元
空间折线
空间环
不确定性
spatial line unit
spatial broken line
spatial link
uncertainty
