  In this paper, we try to find any dependence of the Galactic structural
parameters with the Galactic longitude for either the thin disc or the thick
disc of the Milky Way, that would indicate to possible inhomogeneities or
asymmetries in those Galactic components. Galactic model parameters obtained
using a set of 36 high-latitude fields with 2MASS photometry for the different
fields show that, effectively, they are Galactic longitude-dependent. The thick
disc scaleheight changes from 800 pc at 150 deg < l < 230 deg to 1050 pc at |l|
< 30 deg. A plausible explanation for this finding might be the effect of the
flare in this Galactic component that changes the scaleheight with
Galactocentric distance
