The strategy for the determination of a new local geoid in China |
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| Authors: | Junyong Chen |
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| Institution: | (1) National Bureau of Surveying and Mapping, 100830 Beijing, China |
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| Abstract: | The strategy for the determination of a new local geoid in China is: (1) This task should be fulfilled in a short time as possible; (2) The new local geoid can be with different resolution and accuracy, which depend on the needs of the social and economical development in different regions; (3) The newly established height anomaly control network, i.e. a gridded GPS levelling network should combine as possible with the existing astro-gravimetric levelling network; (4) Global geopotential model, DTM and surface gravity data are used to densify the resolution of the local geoid with remove-restore technique. The accuracy and resolution possibly obtained nowadays within the capability of China are discussed. The required accuracies for GPS positioning, levelling and coordinate transformation are suggested. |
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