  We summarise the results found following a study of the effects that Galactic
magnetic fields can have on the propagation of cosmic rays from local
extragalactic sources. This study focuses on the coherent structures in the
Jansson-Farrar Galactic magnetic field model, namely the: disk field, a
toroidal field, and an x-field components. The phenomena of Galactic magnetic
field shadowing, source deflection, and Galactic magnetic field tunnel vision
are all noted. Attention throughout this study is placed on particles with
rigidity around $10^{18.5}$ EV, believed to dominate the cosmic ray spectrum
above the ankle. The Galactic magnetic field component predominantly
responsible for giving rise to each of these different effects was determined.
