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Positional Accuracy

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Assessment and quantification of the difference between the location of a feature’s geometry in a model such as a map and the true location of that feature on the Earth, in both horizontal and vertical planes.  There are different ways to express the estimated difference such as RMSE and CE90.  The outcome of spatial analysis depends on the quality of the inputs.

The estimated range of error is important to understand the limitations of what the data can validly be used to assess.

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