Positional Accuracy
Positional Accuracy :
The difference between achieved and command test point ocations. Positional accuracy refers to the root mean square error (RMSE) of the coordinates relative to the position of the real world entity being modeled. Positional accuracy shall be specified without relation to scale, and shall contain all errors introduced by source documents, data capture and data processing. http://www.sedris.org/glossary.htm
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