GIS Dictionary

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  1. [surveying] An accurately surveyed line from which other lines or the angles between them are measured.
  2. [surveying] The parallel determined by government land surveyors that intersects the principal meridian to establish an initial point in the U.S. Public Land Survey System and Canada's Dominion Land Survey. Also called a geographer's line. Media/baseline.gif
  3. [GPS] In GPS, the physical distance between a base station and a rover.

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