Spike

Spike - (informal) See verify.

[Category=Postal ]

Source: USPS, 30 October 2009 15:59:09, http://www.usps.com/cpim/ftp/pubs/pub32/pub32q_z.html

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Spike - Spike - A substance that is added to an environmental sample to increase the concentration of target analytes by known amounts; used to assess measurement accuracy (spike recovery). Spike duplicates are used to assess measurement precision.

[Category=Quality Assurance ]

Source: Massachusetts Department of Environmental Protection, 28 March 2011 09:03:38, http://www.mass.gov/dep/cleanup/laws/glossa01.htm

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spike - 

   (1) [statistics] An anomalous data point that protrudes above or below an interpolated surface.
   (2) [data capture] An overshoot line created erroneously by a scanner and its rasterizing software.

[Category=Geospatial ]

Source: esri, 28 August 2012 09:22:42, http://support.esri.com/en/knowledgebase/GISDictionary/term/abbreviation