Fig. 2From: How to improve the accuracy of height data from bird tracking devices? An assessment of high-frequency GPS tracking and barometric altimetry in field conditionsEstimates and 95% confidence intervals for trueness, precision and accuracy for each combination of GPS tag model and method based on hierarchical bootstrapping. Parameters used: median error with true height as reference (equivalent to median height a.g.l.; trueness), median absolute error with median height as reference (precision), median absolute error with true height as reference (accuracy). a.g.l. above ground level, AE absolute errorBack to article page