Absolute Vertical Accuracy (95%)
|Term||Absolute Vertical Accuracy (95%)|
The difference between the recorded elevation of a feature and its true elevation referenced to the same vertical datum expressed as a linear error at 95 percent probability.
It may also be applied to a data set. If the data contains multiple accuracies, usually the worst accuracy which applies to 10% or more of the data is recorded. Linear error probability (LEP) is the linear magnitude within which a stated percentage of measurements for a given point will fall. For example, if the vertical accuracy of a surveyed point is stated as one metre with 95 percent LEP, then 95 percent of measurements of the height of this point will fall along a vertical line of length one metre. The true position is then estimated to lie at the centre of this vertical line.