  Magnetograms from the Vector SpectroMagnetograph (VSM) of the Synoptic
Optical Long-term Investigations of the Sun (SOLIS) project are utilized to
study the latitude distribution of magnetic flux elements as a function of
latitude in the polar solar caps. We find that the density distribution of the
magnetic flux normalized by the surface of the polar cap and averaged over
months decreases close to the solar poles. This trend is more pronounced when
considering only flux elements with relatively large size. The flux density of
the latter is relatively flat from the edge of the polar cap up to latitudes of
70$^\circ$--75$^\circ$ and decreases significantly to the solar pole. The
density of smaller flux features is more uniformly distributed although the
decrease is still present but less pronounced. This result is important in
studying meridional flows that bring the magnetic flux from lower to higher
solar latitudes resulting in the solar cycle reversal. The results are also of
importance in studying polar structures contributing to the fast solar wind,
such as polar plumes.
