Local Accuracies

摘要

The objective of this case study is to evaluate the different approximations in the technical literature that are used to compute the variance-covariance matrix of local accuracies. This analysis compares the rigor and validity of the four most common mathematical formulations that are used for computing the variance-covariance matrix of local accuracies, as determined from the original global Cartesian variance-covariance matrix Σ(χ,y,z) of any given three-dimensional network. These empirical results, which are strictly established on the accepted definition of local accuracies (also referred to as relative accuracies), are an attempt to clarify the adopted standards for computing the variance-covariance matrices of local accuracies.