Method to determine the estimation quality of a query path between at least two points in a geographical area, wherein the query path comprises query locations estimated using a radio-based localization method with a reference map which comprises known reference points which are linked to recorded fingerprints, such as signal values of at least one radio signal, at those that points, wherein the method comprises the following steps: a) gather a number of fingerprints by moving a signal receiver along a known track between at least two known locations Ni and, at distinct time steps ti, storing the received fingerprints; b) query the localization method to estimate query locations Li at every time step ti based on the fingerprints, wherein all query locations Li define the query path; c) in a post-processing step, for each query location Li in the query path, i) determine a corresponding point Ci by a interpolation between the known points Ni based on the recorded time steps and the distance between the known points Ni, ii) calculate the residual Ri between the query location Li and the corresponding point Ci, d) calculate a benchmark score based on all residuals Ri over the query path by using the mean value, the median value, percentiles or extreme values of the residuals, wherein a lower benchmark score indicates a better estimation quality, characterized in that the time delay is corrected by the following steps: e) calculate the benchmark score for a query path, wherein an offset dt is added to the time step ti at every query location Li, f) repeat step e) with different time step offset dt within a range of time step offset, g) identify the time step offset which results in the minimal benchmark score. a) gather a number of fingerprints by moving a signal receiver along a known track between at least two known locations Ni and, at distinct time steps ti, storing the received fingerprints; b) query the localization method to estimate query locations Li at every time step ti based on the fingerprints, wherein all query locations Li define the query path; c) in a post-processing step, for each query location Li in the query path, i) determine a corresponding point Ci by a interpolation between the known points Ni based on the recorded time steps and the distance between the known points Ni, ii) calculate the residual Ri between the query location Li and the corresponding point Ci, i) determine a corresponding point Ci by a interpolation between the known points Ni based on the recorded time steps and the distance between the known points Ni, ii) calculate the residual Ri between the query location Li and the corresponding point Ci, d) calculate a benchmark score based on all residuals Ri over the query path by using the mean value, the median value, percentiles or extreme values of the residuals, wherein a lower benchmark score indicates a better estimation quality, e) calculate the benchmark score for a query path, wherein an offset dt is added to the time step ti at every query location Li, f) repeat step e) with different time step offset dt within a range of time step offset, g) identify the time step offset which results in the minimal benchmark score.