通过对经纬仪测绘法1：50 0地形测图过程中各个工序的分析，得出了1：50 0地形图上的点位中误差。
Through the analysis on every procedure of surveying 1:500 topographic map with the method of transit mapping, the position error of 1:500 topographic map is got.
通过对分段辊测张式板形仪板形检测原理的分析发现，分段辊区域宽度对板形检测精度影响较大。
Through analysis of shape measuring principle of tension measuring type shapemeter with segmented rolls, it is found that effect of width of segmented roller on shape detection precision is large.
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