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Geospatial application: Estimating the spatial accuracy of coordinates collected using the Global Positioning System


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Evaluating the accuracy of spatial data is important to determine appropriate use of these data. However, a good method has not been documented to measure locational accuracy. The Global Positioning System (GPS) reduces the difficulty of measuring the location of objects and enables non-surveyors to determine their location with relative ease. This study applied a straight-forward, repeatable, and statistically sound method of estimating the horizontal accuracy of GPS-derived location data. We concentrated on the spatial accuracy of points because points represent simple locations and not cartographic abstractions such as lines or polygons. When GPS coordinates are taken at surveyed locations, the quantity of interest is the difference [...]



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  • Upper Midwest Environmental Sciences Center (UMESC)



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National Biological Service, Environmental Management Technical Center, Onalaska, Wisconsin

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