NDLI: Geoid refinement of Songyuan irrigation area based on EGM2008 and GPS

Content Provider	IEEE Xplore Digital Library
Author	Wu Qiong Yang Guodong
Copyright Year	2011
Description	Author affiliation: College of Geoexploration Science and Technology, Jilin University, Changchun, China (Wu Qiong; Yang Guodong)
Abstract	Local or regional geoid refinement is the primary commission for the elevation datum. Taking the GPS network of Songyuan irrigation area as an example, this paper refined the local geoid based on the quadratic surface fitting and spatial interpolation of height anomaly, and on the same algorithms of residuals between height anomaly and geoid undulation of EGM2008 with the remove-compute-restore method. The results indicated that the precision of the local geoid refined by the residuals were higher than that refined by the height anomaly. The precision of geoid refined by residuals using quadratic fitting, TPS and KRIGING was similar, and higher than the TPS. The comparison between height anomaly and geoid undulation of EGM2008 showed that the state 1985 height datum and the global datum of EGM2008 had a mean difference of 0.326 m, with the standard deviation of 0.047 m, which indicated that EGM2008 has a relatively higher precision and important significance for the refinement of regional and state geoid.
Starting Page	2666
Ending Page	2669
File Size	476696
Page Count	4
File Format	PDF
ISBN	9781457703201
e-ISBN	9781457703218
DOI	10.1109/ICECC.2011.6066426
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-09-09
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Earth Songyuan Interpolation Accuracy Quadratic surface fitting Fitting Geoid refinement Spatial interpolation Surface fitting EGM2008 Global Positioning System Gravity
Content Type	Text
Resource Type	Article

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