The RGU -photographic investigation of an intermediate latitude field in the direction to the Galactic center is presented .
164 extra-galactic objects , identified by comparison of Minnesota and Basel charts , are excluded from the program .
Also , a region with size 0.104 square-degrees , contaminated by cluster ( M5 ) stars and affected by background light of the bright star HD 136202 is omitted .
Contrary to previous investigations , a reddening of E ( B - V ) = 0.046 , corresponding to E ( G - R ) = 0.07 mag is adopted .
The separation of dwarfs and evolved stars is carried out by an empirical method , already applied in some of our works .
A new calibration for the metallicity determination is used for dwarfs , while the absolute magnitude determination for stars of all categories is performed using the procedures given in the literature .
There is good agreement between the observed logarithmic space density histograms and the galactic model gradients .
Also , the local luminosity function agrees with Gliese ’ s ( 1969 ) and Hipparcos ’ ( Jahreiss & Wielen 1997 ) luminosity functions , for stars with 2 < M ( G ) \leq 8 
mag .
For giants , we obtained two different local space densities from comparison with two Galactic models , i.e . D ^ { * } ( 0 ) = 6.63 , close to that of Gliese ( 1969 ) , and D ^ { * } ( 0 ) = 6.79 .
A metallicity gradient , d [ Fe / H ] / dz = -0.20 dex/kpc , is detected for dwarfs ( only ) with absolute magnitudes 4 < M ( G ) \leq 6 , corresponding to a spectral type interval F5-K0 .