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We estimated the galactic model parameters for a set of 20intermediate-latitude fields with galactic longitudes 0<l<100 and 160<l<240,included in the currently available Data Release 6 (DR6) of SDSS, to exploretheir possible variation with galactic longitude. The local space densities ofthe thick disc and halo are almost the same for all fields,<(n_{2}/n_{1})>=6.52% and <(n_{3}/n_{1})>=0.35%, respectively, a resultdifferent than the one cited for high-latitude fields. The thin disc'sscaleheight is 325 pc in the galactic centre changes to 369 pc in the thirdquadrant, which confirms the existence of disc flare, whereas the thick discscaleheight is as large as 952 pc at galactic longitude l=20 and 10% lower atl=160, which confirms the existence of the disc long bar in the direction l=27.Finally, the variation of the axis ratio of the halo with galactic longitude isalmost flat, <(c/a)>=0.56, except a slight minimum and a small maximum in thesecond and third quadrants, respectively, indicating an effect of the long barwhich seems plausible for a shallow halo. We estimated the metallicities ofunevolved G-type stars and discussed the metallicity gradient for differentvertical distances. The metallicity gradient is d[M/H]/dz=-0.30 dex kpc$^{-1}$for short distances, confirming the formation of this region of the Galaxy bydissipational collapse. However, its change is steeper in the transitionregions of different galactic components. The metallicity gradient is almostzero for inner halo (5<z<10 kpc), indicating a formation of merger or accretionof numerous fragments such as dwarf galaxies.

Estimation of Galactic Model Parameters and Metalicity Distribution in Intermediate Latitudes with SDSS