precision

(1) measure of the repeatability of a set of measurements. Note that precision is usually expressed as a statistical value based upon a set of repeated measurements such as the standard deviation from the sample mean (2) closeness of agreement between indications or measured quantity values obtained by replicate measurements on the same or similar objects under specified conditions

References: 

(1) ISO 19116:2004(en), Geographic information - Positioning services

(2) Joint Committee for Guides in Metrology (JCGM/WG 2) 200:2012 & ISO/IEC Guide 99-12:2007, International Vocabulary of Metrology – Basic and General Concepts and Associated Terms (VIM), http://www.bipm.org/en/publications/guides/vim.html

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