By the point location error analysis of the whole detecting points it presents the synthetic basis of evaluation for the result of the local pipeline reconnaissance.
通过全部检测点的点位误差分析，对当地管线普查成果提供了综合评价依据。
Aimed at the characteristic of bigger single point location error, a new measuring method using two points relative location measurement to reduce location measurement error was put forward.
针对单点定位误差比较大的特点，提出了用两点相对定位的测量方法来减小定位误差。
When the error bound of location deviation is known, the original point pattern relaxation matching algorithm is improved to obtain better matching performance.
研究了在已知最大定位误差的情况下时，如何对基本点特征松弛匹配算法进行改进，以提高匹配性能。
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