GIS中平面线位误差带的可视化表达
摘 要
通过综述GIS中平面线位误差带的发展历程，根据求解曲线族包络线的原理，建立了描述随机线元位置不确定性的误差带“g－带”边界曲线方程的计算通式，从图形角度详细阐述g－带”的形成，形状确定，并给出不同实例的“g－带”可视化图形，直观地向用户展示了线位整体不确定性的区域范围。
关键词
Visul Display on Planar Line’s Error Band in GIS
() Abstract
Based on the synthetic analysis of the planar error band’s development in GIS, the paper derives the general boundary curve’s formula of the“g-band”on the random line segment’s positional uncertainty by means of the envelop theory, analyses the configuration、shape decision and the“g-band”visual figure according to different examples, display the error region size of the line segment’s integral positional uncertainty to the users.
Keywords
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