GIS叠置后同名线元的方差估计
The Variance Estimation of Corresponding Lines in GIS Overlay Operation
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摘要: 将等精度同名点元的方差估计结果扩展到非等精度情况,由此导出了叠置输出图中同名线元上任意点处任意方向的位差估计通用公式和线要素总长度的方差估计公式。Abstract: This paper extends the variance estimation results of equal accuracy corresponding points to unequal accuracy, derives a general formula to estimate the variance of corresponding lines on any point and any directiom, gives the variance estimation formula of the line's length.
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