国家坐标系

GPS测量控制网为了与地面国家控制网进行联合的平差，必须与国家坐标系进行联测，GPS接收机有时也必须安置在有三角钢标的旧有控制点上。

For the purpose of adjusting together with the ground national control network and connecting GPS control network with national coordinate system , sometimes , GPS receiver must be installed on those old control points up which tripod steel targets are set .

手持GPS使用的坐标系统是WGS-84坐标，在普通测量中，可使用5参数法转换到54北京坐标系或80国家坐标系。

The coordinate system GPS handset used is WGS-84 coordinate system , in ordinary surveying , 5 parameters method can be used to converse it to 54 Beijing or 80 state coordinate systems .

地方坐标系与国家坐标系转换方法探讨

A Study of Coordinate Transformation between Local System and National System

本文介绍如何求解系统转换参数，将WGS-84坐标转换为我国目前使用的是1954年北京坐标系或1980年国家大地坐标系。进而可以利用GIS技术建立活断层信息管理数据库系统。

In this paper , how to transfer WGS-84 coordinate system into Beijing 1954 geodetic system or state 1980 geodetic system , and build up information managing system of active faults by GIS .

2000国家大地坐标系椭球参数与GRS80和WGS84的比较

Parameters of the CGCS 2000 Ellipsoid and Comparisons with GRS 80 and WGS 84

2000国家大地坐标系下点位坐标转换方法浅析

A Discussion on Methods for Transforming Point Position Coordinate from Previous Geodetic Coordinate System to next Generation CGCS 2000

GPS控制网应用于山区水土流失监控测量，必须将WGS-84坐标系转换为实用的国家或地方坐标系，并注意基准点的选择与检验。

The GPS control net is applied for monitoring and measuring the soil and water loss of mountainous regions . It must turn WGS-84 coordinate series into practical state or local coordinate series . In the meanwhile , it should select and examine datum points .

高速公路平面控制测量需要将控制点纳入国家高斯平面坐标系，由此不可避免地出现距离长度变形，并导致平面控制测量投影面与施工高程面分离。

It is inevitable that the length distortion will happen when the control points are linked to the State Gauss Plane Coordinates System in the plane control surveying for speedways , by which the construction elevation plane would separated from the projection plane of control surveying .