Comparison of the atmospheric parameters adopted in PVK and estimated using V1 and V2 versions of the interpolator with those of the literature compilation. The abscissae are the values from the compilation, and the ordinates of the top plot of each panel are those from PVK, V1, or V2. The residuals presented in the bottom plot of each panel are the PVK, V1, or V2 values minus those of the compilation. The red lines show the biases, the bold sections indicating regions where they are statistically significant. The stars labelled with numbers are discussed in Sect. 5.4. The colour of the symbols represents the temperature and the size is linked to the surface gravity.