GPS technology has demonstrated stellar performance ever since its inception. The uses and applications have grown at an incredibly rapid rate. From navigation to recreational uses, from mapping to precision surveying and GIS, the ubiquitous nature of GPS is impacting our lives in a positive manner. Many of these applications provide precise positions, some in real time. Delivered with this precision is an implied understanding of some fundamental concepts that are often overlooked. The GPS, Geodesy, and Application Program (GPS-GAP) is an online educational initiative by the University of Maine that offers in-depth knowledge about this fantastic system to help GPS and GIS users understand all the parameters necessary for precise positioning, including the geodetic foundation.

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