DISCUSSION ON RELATION BETWEEN DATUMCONDITION AND COORDINATE SYSTEM
Zhao Yihan 1) ; Wu Jicang 1，2) ; and Wang Wei 1)
1)Department of Surveying and Geoinformatics,Tongji University,Shanghai 2000922)Key Laboratory of Advance Engineering Survey of SBSM,Shanghai 200092
Abstract Because the free net adjustment model is rankdefect, the normal equation derived with the LS method has an infinite number of solutions. Geodetically, the configuration of geodetic network can not be fixed. In order to obtain a unique configuration of geodetic network, some datum conditions should be introduced into. In other words, coordinate system will be determined if datum is given. Therefore datum must involve some information for defining coordinate system. Three kinds of datum conditions and a general solution in free geodetic network adjustment are presented here, and a formula about the relation between datum condition and coordinate system is test through an example.
Key words ：
free network
datum condition
coordinate system
inner adjustment constraint matrix
normal equation
Received: 01 January 1900
Corresponding Authors:
Zhao Yihan
Cite this article:
Zhao Yihan ,Wu Jicang,and Wang Wei . DISCUSSION ON RELATION BETWEEN DATUMCONDITION AND COORDINATE SYSTEM[J]. , 2007, 27(2): 89-93.
Zhao Yihan ,Wu Jicang,and Wang Wei . DISCUSSION ON RELATION BETWEEN DATUMCONDITION AND COORDINATE SYSTEM[J]. jgg, 2007, 27(2): 89-93.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2007/V27/I2/89
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