  In this paper we will present in more detail a construction using Wilson
lines and the corresponding dual Galilean conformal field theory calculations
for analytically determining holographic entanglement entropy for flat space in
$2+1$ dimensions first presented in hep-th/1410.4089. In addition we will show
how the construction using Wilson lines can be expanded to flat space
higher-spin theories and determine the thermal entropy of (spin-3 charged) flat
space cosmologies using this approach.
