  The standard approach to cosmic-ray (CR) propagation in the Galaxy is based
on the assumption that local transport properties can be extrapolated to the
whole CR confining volume. Such models tend to underestimate the gamma-ray flux
above few GeV measured by the Fermi Large Area Telescope towards the inner
Galactic plane. We consider here for the first time a phenomenological scenario
allowing for both the rigidity scaling of the diffusion coefficient and
convective effects to be position-dependent. We show that within this approach
we can reproduce the observed gamma-ray spectra at both low and mid Galactic
latitudes - including the Galactic center - without spoiling any local CR
observable.
