子午线数字中继器通过一个红色LED条线图测量磁场或真是指向，误差仅为1/10度。
The Meridian Digital Repeater indicates magnetic or true heading to 1/10th of a degree and rate of turn via a red LED bar graph.
对于专门进行地震定位研究的工作，还提供了绘制地震定位误差二维等值线图和三维误差分布图的功能。
For special earthquake location research, it also provides function to draw two dimensional isogram drawings of earthquake location error and distribution drawings of three dimensional error.
讨论与分析了测边后方交会点的精度问题，同时给出了点位误差特性曲线图。
This paper discusses and analyzes the accuracy problem of linear-resection points. At the same time, the property graph of point position error is given.
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