高程基准

GPS跨海水准的关键问题是海峡两侧的高程基准不一致，因此无法采用常规的数值拟合方法。

The key of GPS leveling across sea is that the height datum on each side of channel is not consistent , so the general geometrical fitting method can not be used directly .

大地水准面或似大地水准面是获取地理空间信息的高程基准面。

Geiod or quasi-geoid is a height datum for acquiring geospatial information .

大地水准面重力位的系统误差或重力位漂移δW会直接影响地球外部重力场以及高程基准。

The geopotential system error or the geopotential shift % δ W % exerts direct influences on the gravity field as well as the datum height system .

中国近海海面地形及青岛站高程基准的差距

China offshore sea-surface topography and Qingdao station elevation datum 's difference

关于黄海高程基准面的真值

On the true value of the geoid in the Huanghai Sea

坐标系统、投影方式和高程基准的相互变换；

Interconverting coordinate systems , altitude datum and projection systems .

华南沿海地区的高程基准面

Elevation datum in the coastal area of South China

阐述了1985国家高程基准研究工作和成果。

Research on the 1985 National Elevation Datum and the results obtained are highlighted .

1985国家高程基准的系统差

Systematic Error of the 1985 National Height Datum

1985国家高程基准相对于大地水准面的垂直偏差

The Origin Vertical Shift of National Height Datum 1985 with respect to the Geoidal Surface

区域性高程基准的统一

Unification of regional or local height datum

所以，就大地水准面在数字城市中提供高程基准的功能以及精化技术进行了深入的分析研究。

The geoid as the height datum is needed in the construction of digital city .

回顾了我国大地测量在建立国家平面基准、国家高程基准、国家重力基准等方面的情况。

The establishment of national horizontal , vertical and gravity datum in China is reviewed .

中国平均海面与国家高程基准之间的偏差

Difference between mean sealevel and national geoid ( 1985 ) along the coast of China

中国大陆和香港高程基准面重力位差的测定

Measurement of difference of gravity potentials between height datums of the mainland and Hong Kong

1985国家高程基准与全球似大地水准面之间的系统差及其分布规律

The Systematic Difference and Its Distribution between the 1985 National Height Datum and the Global Quasigeoid

论我国高程基准面的确定问题

On Determination of the elevation datum

1985年国家高程基准

National Height Datum 1985

海面倾斜与高程基准密切相关，它已经受到大地测量学界和海洋学界的重视。

There is a close correlation between sea level slope and height datum , in which geodesylists and oceanographers are interested .

确定了香港主要高程基准面与我国1956黄海高程基准面的重力位差。

The geo-potential difference between Hong Kong Principal Datum and1956 yellow sea height datum of China was determined in the paper .

提出了国家地理空间信息基准框架内改进与更新原有的大地坐标基准、高程基准和重力基准的建设道路及解决原则。

The higher requirement of the former coordinate datum , height datum and gravity datum was in dire need of improvement and update in modernization .

本文系统地研究了建立高程基准的理论与方法、地心运动规律及其对高程基准的影响等有关问题。

This dissertation presents the theory and method on the establishment of height datums . And some problems on the geocenter motion are also studied .

本文仅讨论永久性潮汐对重力基准、高程基准、大地水准面、垂线偏差等方面的影响。

In the paper only the influences of permanent tides on the gravity datum , height datum , geoid and deflections of the vertical are discussed .

整体结构高程基准面采用理论深度基准面。主要包括三个部分：软基处理、围堰、填料。

The overall structure of the height datum using the theoretical depth datum . , Mainly includes three parts : the soft foundation treatment , cofferdam , packing .

局部高程基准的转换与统一，不得不涉及沿海各主要验潮站平均海平面的变化。

In fact , the transformation and unification of the local height datums have relations to the mean sea level variation at the shore where the tide gauges are located .

地图数学基础主要涉及大地坐标系统、地图投影系统、陆地高程基准、海洋深度基准以及与之相关的地图分幅、编号、分带等多种因素。

The map mathematics basic refers to geodetic coordinate system , map projection system , altitude datum , depth system and map subdivision , number , zone dividing which are related .

从温州典型软土地基的实际出发，介绍了如何确保水准点埋石质量，以达到城市高精度的高程基准网建设；

In or-der to construct a high precise Geodetic datum network for city , we introduce how to ensure quality of burying the level points considering the typical soft foundation of Wenzhou .

全球或区域性高程基准面的统一始终是大地测量学研究的主要内容之一，对于构建数字区域和数字地球及研究全球或区域性环境变化具有重要的科学意义和现实意义。

The unification of global and local or regional height datum , is very important to construct digital region and digital earth , and also to study some global or regional environment changes .

结合温州市二等水准网建立的实践经验，阐述了城市高程基准网的方案设计、组织实施和成果的分析与利用是建立城市高程基准网的关键；

Combined the practical experience of second-class leveling network of Wenzhou , we expound that the plan design , practice arrange , results ' analysis and use are the keys to construct city 's Geodetic datum network .

首先介绍了高程基准的定义与现状，指出了用验潮站长期平均海平面建立局部高程基准所存在的问题；

First , the defmation and status of height datums is introduced and some problems on the local height datums established by the mean sea level , which is defined by the tide gauge data , are discussed .