提出用缓冲区整体置信带对GIS中矢量缓冲区进行可靠性评定的方法 ,分别研究了点状和线状目标缓冲区整体置信带的情况。提出用一类似相对误差的量K值来对缓冲区整体置信带进行定量分析 ,并推导出具体的计算公式 ,最后的算例和分析部分重点考察对线段缓冲区K值产生影响的各因子 ,并得出直线端点误差和置信水平是影响缓冲区不确定性传播的关键因素

The confidence band model of uncertainty propagation on vector buffer in GIS is proposed in this paper. The buffer confidence band of point feature and liner feature is discussed respectively. A new coefficient, K , similar to relative accuracy is suggested to estimate confidence band quantitatively. The formula to compute the coefficient is introduced. The test section mainly discusses the effect of the factors, finally this paper concludes that the error of line vertex and confidence level is the key factor to the uncertainty propagation during the buffer operation.