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《Science of Surveying and Mapping》 2004-02
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Unification of regional or local height datum

LUO Zhi-cai~①,NING Jin-sheng~①,XU Ju-sheng~②(①The Key Laboratory of Geospace Environment and Geodesy,Ministry of Education,School of Geodesy and Geomatics,Wuhan University,Wuhan 430079,China;②Institute of Wuhan Seism,Wuhan 430072,China)  
The unification of global and local or regional height datum,is very important to construct “digital region” and “digital earth”,and also to study some global or regional environment changes. Using high precision GPS/leveling data and global earth's gravity field models EGM96 and WDM94,the geo-potential difference between Hong Kong Principal Datum (HKPD) and 1956 yellow sea height datum of China was determined in the paper.The geo-potential difference is (8.366±0.765)m~2s~(-2).It means that the surface of HKPD is averagely (0.855±0.078)m lower than 1956 yellow sea height datum surface of China.This result is very useful to the unification of height datum for these two neighboring regions.
【Fund】: 国家自然科学基金资助项目 (4 0 0 74 0 0 5 )
【CateGory Index】: P224
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【Citations】
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【Co-citations】
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【Co-references】
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【Secondary References】
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1 LIAO Xin-yu①, ALF-Nu①, HOU Wei-hua②(①College of Architecture, Xinjiang University, Urumqi 830008, China;② Municipal Engineering Administration and Maintaining Department, Urumqi 830008, China);A new method to draw cross section diagrams quickly with AutoCAD and Excel[J];Science of Surveying and Mapping;2008-02
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