摘要
现有的线元位置不确定性模型 ,如“e 带”、“g 带”等 ,其带宽是可变的 ,在应用上不及“ε -带”广泛 ,但“ε -带”的宽度不易确定。本文引入熵理论 ,根据线元的平均信息熵确定了带宽 ,提出了线元的平均熵带。所提的指标既考虑了“ε -带”等带宽的要求 ,又考虑到了线元上误差分布的不均匀特点。
Both the existed “e\|band” and the “g\|band” have a variable band width and their applications are less than ε\|band, but the width of ε\|band can't be easily determined.The model of entropy uncertainty band is presented based on average value in this paper.It excels existed other models due to the characteristic of ε\|band and entropy while a suitable measure index of positional uncertainty for line segments.
出处
《工程勘察》
CSCD
北大核心
2002年第6期29-31,共3页
Geotechnical Investigation & Surveying
基金
国家自然科学基金资助项目 (46 0 710 6 8)
关键词
GIS
平面线元
熵
指标
line segment
positional uncertainty
entropy
