Аннотация:Developing methods for analyzing and extracting information from modern sky surveys is a challenging task in astrophysical
studies and is important for many investigations of galactic and extragalactic objects. We have designed a method for determination of stellar
parameters and interstellar extinctions from multicolor photometry. This
method was applied to objects drawn from modern large photometric surveys. In this work, we give a review of the surveys and discuss problems of
cross-identification, paying particular attention to the information flags
contained in the surveys. Also we have determined new statistical relations to estimate the stellar atmospheric parameters using MK spectral
classification.