此外，目前许多城市的地方坐标系统与国家坐标系统之间缺乏精确严格的换算关系。
Moreover, the local coordinate systems in the cities of our country lack in direct and precise connection to the geocentric coordinate system and the national coordinate system.
将来自不同国家的数据源进行数据转换、投影变换和误差校正，转换为统一的数据格式和投影坐标系统。
The data from the data sources of different countries are converted into the unifying data format and projection coordinates system by data conversion, projection conversion and error correction.
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.
应用推荐