What is the difference between 1954 Beijing coordinate system and 2000 national geodetic coordinate system?

The differences between the 1954 Beijing coordinate system and the 2000 national geodetic coordinate system are mainly as follows:

1. Different types of coordinate systems: the 1954 Beijing coordinate system is a spatial right-angle coordinate system, while the 2000 national geodetic coordinate system is a geocentric coordinate system.

2. The direction of coordinate axes is different: the x-axis of 1954 Beijing coordinate system is a little bit to the east, while the x-axis of 2000 National Geodetic Coordinate System (NGCS) is more accurate.

3. Difference in coordinate representation: 1954 Beijing coordinate system uses 7-digit integer and 8-digit integer (the first two digits are signed) to represent coordinate values, while 2000 National Geodetic Coordinate System (NGCS) uses Gaussian Plane Right Angle Coordinate System (GPRCS) to represent coordinate values.

4. The application scope is different: 1954 Beijing coordinate system applies to some traditional fields, such as construction, transportation, etc., while 2000 National Geodetic Coordinate System applies to a wider range of fields, such as geographic information system, navigation, geophysics, etc.

In short, the 1954 Beijing coordinate system and the 2000 national geodetic coordinate system are different in terms of type, direction of coordinate axes, coordinate representation and application scope.