Preserving accuracy when using a 2-d map requires understanding spatial reference systems and using them appropriately.
使用2 - d地图时保持精确度需要理解空间引用系统并合理使用。
Normally found in standard inertial reference systems, gyro-compassing enables the unit to establish precise heading within moments, without the use of a magnetic flux valve or magnetometer.
通常放置在标准惯性参考系统中，陀螺仪能够使设备在瞬间建立精确的航向，而不使用磁通阀或者磁力计。
It is necessary to unify different geodetic reference systems in order to realize comprehensive utilization of surveying achievement in different systems.
为综合应用不同参考坐标系中的测量成果，必须实现不同参考坐标系的统一。
Firstly, a series of reference systems, related to GPS navigation positioning system, such as timing system, reference frame and force model system, are discussed in detail.
本文详细地论述了与GPS导航定位系统一系列有关的参考系统：时间系统、坐标系统和力模型系统。
Many references show that the theoretic and practical researches on inertial surveying and attitude reference systems are predominantly in the field of sensor data integration.
文献分析表明，惯性测量与姿态参考系统的理论及应用研究主要集中在传感器信息综合方面。
The semantic reference systems will enable producers and users of geographical information to explain the meaning of thematic data and to integrate data across differing semantics.
语义参照系统主要用于在地理信息的生产者和用户之间解释专题数据的意义，实现对不同语义数据的集成。
By using Lorentz transformation, this article explains the paradox of Lorentz length contraction, it also proves that observers in different reference systems reach the same observing conclusion.
本文应用洛仑兹变换和信号的传播速度小于光速，解释了洛仑兹长度收缩佯谬，具体证明了在不同参照系上的观测者，观测所得结论相同。
By using Lorentz transformation, this article explains the paradox of Lorentz length contraction, it also proves that observers in different reference systems reach the same observing conclusion.
本文应用洛仑兹变换和信号的传播速度小于光速，解释了洛仑兹长度收缩佯谬，具体证明了在不同参照系上的观测者，观测所得结论相同。
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