三等水准高程控制网的施测及精度统计；
Survey the third order heigh level control network and conduct the statistics of the precision;
北京水准原点是我国高程控制网中的一个重要基准点。
The Beijing Fundamental Bench Mark (BFBM) is an important reference datum in the elevation control network in China.
现介绍本次永久性水准点的施工方法及高程控制网的建立过程。
The present construction method of permanent benchmarks and establishing process of altitude control network are introduced at present.
利用成都市似大地水准面模型探测和分析了两个传统高程控制网中可能存在的系统偏差。
The systematic bias of the two traditional vertical network was detected and analyzed by use of Chengdu quasi-geoid.
中海壳牌南海石化项目因工程建设的需要，在厂区范围内建立了四个永久性水准点作为场地高程控制网。
The four permanent benchmarks are built as the altitude control network in the place because of the requirement for the CSPC Nanhai petrochemical project's building.
中海壳牌南海石化项目因工程建设的需要，在厂区范围内建立了四个永久性水准点作为场地高程控制网。
The four permanent benchmarks are built as the altitude control network in the place because of the requirement for the CSPC Nanhai petrochemical project's building.
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