Comparative Analysis of Atmospheric Parameters Obtained from the Photometric and Spectroscopic Techniques

We present a comparative analysis of atmospheric parameters obtained with the so-called photometric and spectroscopic techniques using the DA white dwarfs identified in the Data Release 7 of the Sloan Digital Sky Survey. We also exploit the sensitivity of the Balmer jump to surface gravity, using the (u - g) color index, to study the well known high-log g problem.