Furthermore, when combined with general GPS data-processing software, it can provide some degree of vertical control additionally to the latter's horizontal control.
进一步，若将其与常用的GPS数据处理软件相结合，可使后者在提供平面控制的同时，也能提供一定等级的高程控制。
GPS horizontal control network data processing.
GPS平面控制网的数据处理。
The traverse net is one of the main method of seting up horizontal control nets.
导线网是建立平面控制网的主要方法之一。
Research purposes: Through the theoretical research, this paper puts forward some suitable suggestions on the main technical standards of horizontal control survey for ballastless track construction.
研究目的：通过理论研究，对无碴轨道施工平面控制测量的主要技术标准提出适宜的建议。
So the establishing of(horizontal) control datum with appropriate precision standards systematically is the precondition to make sure the precision of ballastless track laying.
系统建立适宜精度标准的平面控制基准，是保障无碴轨道铺设精度指标顺利实现的前提。
So the establishing of(horizontal) control datum with appropriate precision standards systematically is the precondition to make sure the precision of ballastless track laying.
系统建立适宜精度标准的平面控制基准，是保障无碴轨道铺设精度指标顺利实现的前提。
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