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Fig. 3.27 Point distribution of China Gravity Basic Network 2000
reached a world-leading level. The next section gives an overview of the establish-
ment of China's gravity network (see Table
3.6
).
3.4.3 Establishment of China's National Gravity Networks
Absolute gravimetry primarily allows the determination of gravity for a small
quantity of gravity base stations because the measuring equipment is bulky and
costly. As a fundamental approach to gravimetric survey, relative gravity measure-
ments are widely applied for the determination of gravity values on the Earth's
surface. The discussion here is centered on the plans and methods for establishing
gravity networks based on relative gravity measurements.
Fundamental Principles for Establishing China's National Gravity
Networks
1. The national gravity network should cover all the provinces, autonomous
regions, municipalities directly under the central government, the South China
Sea, and Hong Kong and Macao Special Administrative Regions.
2. The absolute gravity stations in the net should be evenly distributed.
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