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《Science of Surveying and Mapping》 2008-02
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Discussion on some application cases of the error propagation law

HAN Li-rong①,ZHANG Zhan-jie②(①Hydroelectric Department of Qinghai University,Xining 810016,China;②Center for Earth observation and Digital Earth Chinese Academy of Sciences,Beijing 100101,China)  
This paper discusses some application cases of the error propagation law by the examples of trigonometrical survey, and presents that not only sum function and numeral multipling function in which there is only one independent observed value but also more complex functions which are equal in mathematics are not opposite in the process of error propagation according to the error propagation law. If there is unnecessary direct observed value in survey work, it need to calculate functions by indirect adjusted value, so the functions which are equal in mathematics can get same mean error of the functions.
【CateGory Index】: P207
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