  We present a new Galaxy population synthesis Model (GalMod). GalMod is a
star-count model featuring an asymmetric bar/bulge as well as spiral arms and
related extinction. The model, initially introduced in Pasetto et al. (2016b),
has been here completed with a central bar, a new bulge description, new disk
vertical profiles and several new bolometric corrections. The model can
generate synthetic mock catalogs of visible portions of the Milky Way (MW),
external galaxies like M31, or N-body simulation initial conditions. At any
given time, e.g., a chosen age of the Galaxy, the model contains a sum of
discrete stellar populations, namely bulge/bar, disk, halo. These populations
are in turn the sum of different components: the disk is the sum of spiral
arms, thin disks, a thick disk, and various gas components, while the halo is
the sum of a stellar component, a hot coronal gas, and a dark matter component.
The Galactic potential is computed from these population density profiles and
used to generate detailed kinematics by considering up to the first four
moments of the collisionless Boltzmann equation. The same density profiles are
then used to define the observed color-magnitude diagrams in a user-defined
field of view from an arbitrary solar location. Several photometric systems
have been included and made available on-line and no limits on the size of the
field of view are imposed thus allowing full sky simulations, too. Finally, we
model the extinction adopting a dust model with advanced ray-tracing solutions.
The model's web page (and tutorial) can be accessed at www.GalMod.org.
