The accuracy of Orthometric Height will be directly affected by ellipsoidal height precision during GPS height transformation, therefore, the detection of gross error is very important.
The method is put forward based on isoline map discerning GPS' heightgross error, and tested by a example.
本文提出基于等值线来识别GPS高程粗差的方法，并通过实例进行了验证。
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The gross flowers and height, diameter, crown width, crown height, crown surface of Chinese fir clones in Guangxi area were investigated by genetic correlation analysis and path-coefficient analysis.