Well you use a Quadtree for path-finding. That gives you some advantages- regarding 
a) Resolution, (Long stretches of open terrain can be handled in one entry)
b) Memory needed (Quadtrees are always just resolved as deep as needed and can be placed cache friendly in mem)
c) Ask kloot. <a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;user&#x2F;Kleaut" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;user&#x2F;Kleaut</a><p>Regards